diff --git a/api/analysis.php b/api/analysis.php
index 282d02f..3fcefbc 100644
--- a/api/analysis.php
+++ b/api/analysis.php
@@ -333,6 +333,7 @@ if (!empty($shieldStatusIds)) {
 // Group events by abilityId, then cluster by time proximity (≤ 1000ms from
 // the first event in the cluster) to avoid fixed-window boundary splits.
 const CLUSTER_WINDOW_MS = 1000;
+const HEAVY_TANKBUSTER_MIN_HP_RATIO = 0.33;
 
 $byAbility = []; // abilityId → [{ts, tgtId, amount, hp, maxHp, buffs, name}]
 foreach ($allEvents as $ev) {
@@ -404,7 +405,26 @@ foreach ($byAbility as $abId => $events) {
 
 $aoeEvents = [];
 foreach ($clusters as $group) {
-    if (count($group['targets']) < 3) continue;
+    $targetCount = count($group['targets']);
+    $isHeavyTankbuster = false;
+    if ($targetCount < 3) {
+        foreach ($group['targets'] as $tgtId => $tgt) {
+            $p = $players[$tgtId] ?? null;
+            if (($p['role'] ?? null) !== 'tank') continue;
+
+            $tankMaxHp = (int)($tgt['maxHp'] ?? 0);
+            $rawDamage = max(
+                (int)($tgt['unmitigatedAmount'] ?? 0),
+                (int)($tgt['amount'] ?? 0) + (int)($tgt['absorbed'] ?? 0) + (int)($tgt['mitigated'] ?? 0)
+            );
+            if ($tankMaxHp > 0 && $rawDamage >= $tankMaxHp * HEAVY_TANKBUSTER_MIN_HP_RATIO) {
+                $isHeavyTankbuster = true;
+                break;
+            }
+        }
+    }
+
+    if ($targetCount < 3 && !$isHeavyTankbuster) continue;
 
     $targets = [];
     foreach ($group['targets'] as $tgtId => $tgt) {
@@ -443,11 +463,12 @@ foreach ($clusters as $group) {
     });
 
     $aoeEvents[] = [
-        'timestamp'   => $group['timestamp'],
-        'abilityId'   => $group['abilityId'],
-        'abilityName' => $group['abilityName'],
-        'targets'     => $targets,
-        'totalDamage' => array_sum(array_column($targets, 'amount')),
+        'timestamp'          => $group['timestamp'],
+        'abilityId'          => $group['abilityId'],
+        'abilityName'        => $group['abilityName'],
+        'targets'            => $targets,
+        'totalDamage'        => array_sum(array_column($targets, 'amount')),
+        'isHeavyTankbuster'  => $isHeavyTankbuster,
     ];
 }
 usort($aoeEvents, fn($a, $b) => $a['timestamp'] <=> $b['timestamp']);
diff --git a/auth/callback.php b/auth/callback.php
index 795a115..b96897d 100644
--- a/auth/callback.php
+++ b/auth/callback.php
@@ -2,10 +2,17 @@
 require_once __DIR__ . '/../config.php';
 session_start_safe();
 
+function redirect_with_error(string $returnPath, string $error): void {
+    $separator = str_contains($returnPath, '?') ? '&' : '?';
+    header('Location: ' . $returnPath . $separator . 'error=' . rawurlencode($error));
+    exit;
+}
+
+$returnPath = safe_return_path($_SESSION['oauth_return'] ?? null);
+
 // user denied access
 if (isset($_GET['error'])) {
-    header('Location: ../index.php?error=' . urlencode($_GET['error']));
-    exit;
+    redirect_with_error($returnPath, $_GET['error']);
 }
 
 // CSRF check
@@ -21,12 +28,11 @@ if (
 }
 
 if (empty($_GET['code'])) {
-    header('Location: ../index.php?error=missing_code');
-    exit;
+    redirect_with_error($returnPath, 'missing_code');
 }
 
 $verifier = $_SESSION['pkce_verifier'];
-unset($_SESSION['pkce_verifier'], $_SESSION['oauth_state']);
+unset($_SESSION['pkce_verifier'], $_SESSION['oauth_state'], $_SESSION['oauth_return']);
 
 $post = http_build_query([
     'grant_type'    => 'authorization_code',
@@ -56,12 +62,11 @@ if ($curlError || $status !== 200 || empty($data['access_token'])) {
         'http_status' => $status,
         'response_body' => $body,
     ];
-    header('Location: ../index.php?error=token_failed');
-    exit;
+    redirect_with_error($returnPath, 'token_failed');
 }
 
 $_SESSION['access_token']  = $data['access_token'];
 $_SESSION['token_expires'] = time() + ($data['expires_in'] ?? 3600);
 
-header('Location: ../index.php');
+header('Location: ' . $returnPath);
 exit;
diff --git a/auth/start.php b/auth/start.php
index fa39fda..a3f96da 100644
--- a/auth/start.php
+++ b/auth/start.php
@@ -8,6 +8,7 @@ $state     = bin2hex(random_bytes(16));
 
 $_SESSION['pkce_verifier'] = $verifier;
 $_SESSION['oauth_state']   = $state;
+$_SESSION['oauth_return']  = safe_return_path($_GET['return'] ?? ($_SERVER['HTTP_REFERER'] ?? null));
 
 $params = http_build_query([
     'response_type'         => 'code',
diff --git a/js/analysis.js b/js/analysis.js
index 73ac170..a252c0e 100644
--- a/js/analysis.js
+++ b/js/analysis.js
@@ -77,6 +77,20 @@
         return `${min}:${sec}`;
     }
 
+    function normalizeFightName(name) {
+        return String(name ?? '').trim().toLowerCase();
+    }
+
+    function currentFightName() {
+        const fight = (window.App?.fights ?? []).find(f => f.id === window.App?.fightId);
+        return normalizeFightName(fight?.name);
+    }
+
+    function isSameFightName(fight) {
+        const name = currentFightName();
+        return name !== '' && normalizeFightName(fight?.name) === name;
+    }
+
     let hiddenPlayers      = new Set();
     let hiddenPlayerNames  = new Set();
     let lastEvents     = [];
@@ -265,7 +279,7 @@
     let allSameReportFights = [];
 
     function populateRefFightSelect() {
-        const visible = allSameReportFights.filter(f => f.id !== window.App.fightId);
+        const visible = allSameReportFights.filter(f => f.id !== window.App.fightId && isSameFightName(f));
         refFightSelect.innerHTML = '<option value="">Kein Vergleich</option>';
         visible.forEach(f => {
             const hp  = f.kill ? 'Kill' : (f.fightPercentage != null ? f.fightPercentage.toFixed(2) + '%' : '?');
@@ -288,8 +302,22 @@
     const refExtPanel       = document.getElementById('ref-ext-panel');
     const refReportInput    = document.getElementById('ref-report-input');
     const refReportLoad     = document.getElementById('ref-report-load');
+    const refFflogsLink     = document.getElementById('ref-fflogs-report-link');
     const refExtFightSelect = document.getElementById('ref-ext-fight-select');
 
+    function updateRefFflogsLink(fightId = 0) {
+        if (!extReportCode) {
+            refFflogsLink.style.display = 'none';
+            refFflogsLink.href = '#';
+            return;
+        }
+
+        refFflogsLink.href = window.App?.fflogsReportUrl
+            ? window.App.fflogsReportUrl(extReportCode, fightId)
+            : `https://www.fflogs.com/reports/${encodeURIComponent(extReportCode)}${fightId ? `#fight=${fightId}` : ''}`;
+        refFflogsLink.style.display = '';
+    }
+
     refReportInput.addEventListener('input', () => {
         const match = refReportInput.value.match(/fflogs\.com\/reports\/([A-Za-z0-9]+)/);
         if (match) refReportInput.value = match[1];
@@ -313,13 +341,14 @@
                 body:    new URLSearchParams({ report_code: code, language: window.App.language }),
             });
             const json = await res.json();
-            if (json.reauth) { window.location.href = 'auth/start.php'; return; }
+            if (json.reauth) { window.location.href = window.App?.authStartUrl?.() ?? 'auth/start.php'; return; }
 
             const fights = json?.data?.reportData?.report?.fights ?? [];
             extFights      = fights;
             extReportCode  = code;
+            updateRefFflogsLink();
 
-            const visibleExt = fights;
+            const visibleExt = fights.filter(isSameFightName);
             refExtFightSelect.innerHTML = '<option value="">— Fight auswählen —</option>';
             visibleExt.forEach(f => {
                 const hp  = f.kill ? 'Kill' : (f.fightPercentage != null ? f.fightPercentage.toFixed(2) + '%' : '?');
@@ -330,8 +359,9 @@
             });
             refExtFightSelect.style.display = visibleExt.length ? '' : 'none';
             refExtPanel.style.display = '';
-            if (preferredFightId) {
+            if (preferredFightId && visibleExt.some(f => f.id === preferredFightId)) {
                 refExtFightSelect.value = String(preferredFightId);
+                updateRefFflogsLink(preferredFightId);
                 await loadExternalCompare(preferredFightId);
             }
         } catch { }
@@ -392,7 +422,9 @@
     }
 
     refExtFightSelect.addEventListener('change', async () => {
-        await loadExternalCompare(parseInt(refExtFightSelect.value, 10));
+        const refId = parseInt(refExtFightSelect.value, 10) || 0;
+        updateRefFflogsLink(refId);
+        await loadExternalCompare(refId);
     });
 
     // ── Timeline rendering ────────────────────────────────────────────────────
@@ -427,6 +459,7 @@
                 !hiddenPlayers.has(t.id) &&
                 (!playerFilter || t.name.toLowerCase().includes(playerFilter))
             );
+            if (ev.isHeavyTankbuster && !visibleTargets.some(t => t.role === 'tank')) return '';
             if (!visibleTargets.length) return '';
 
             // Collect boss debuffs (Reprisal/Feint/Addle) once at event level
@@ -643,7 +676,7 @@
             return;
         }
 
-        if (json.reauth) { window.location.href = 'auth/start.php'; return; }
+        if (json.reauth) { window.location.href = window.App?.authStartUrl?.() ?? 'auth/start.php'; return; }
         if (json.error)  { setEmpty('Fehler: ' + json.error); return; }
 
         lastFightId = fightId;
@@ -698,6 +731,8 @@
             refFightSelect.style.display = 'none';
             refExtFightSelect.value        = '';
             refExtFightSelect.style.display = 'none';
+            refFflogsLink.style.display = 'none';
+            refFflogsLink.href = '#';
             refExtPanel.style.display = 'none';
             const exportBtn = document.getElementById('export-to-planner-btn');
             if (exportBtn) exportBtn.style.display = 'none';
diff --git a/js/app.js b/js/app.js
index 3389b1a..0c7b0f7 100644
--- a/js/app.js
+++ b/js/app.js
@@ -7,6 +7,7 @@ document.addEventListener('DOMContentLoaded', () => {
     const initialHint       = document.getElementById('initial-hint');
     const fightSelectCard   = document.getElementById('fight-select-card');
     const fightSelect       = document.getElementById('fight-select');
+    const fflogsReportLink  = document.getElementById('fflogs-report-link');
     const languageSelect    = document.getElementById('language-select');
     const explorerCard      = document.getElementById('event-explorer-card');
     const exLoadBtn         = document.getElementById('ex-load-btn');
@@ -59,6 +60,36 @@ document.addEventListener('DOMContentLoaded', () => {
     }
     window.App.setUrlState = setUrlState;
 
+    function authStartUrl() {
+        return 'auth/start.php?return=' + encodeURIComponent(window.location.pathname + window.location.search);
+    }
+    window.App.authStartUrl = authStartUrl;
+
+    function fflogsReportUrl(reportCode, fightId = 0) {
+        const code = String(reportCode || '').trim();
+        if (!code) return '#';
+
+        const host = {
+            de: 'de.fflogs.com',
+            fr: 'fr.fflogs.com',
+            jp: 'ja.fflogs.com',
+        }[window.App.language] ?? 'www.fflogs.com';
+        const fight = parseInt(fightId, 10) || 0;
+        return `https://${host}/reports/${encodeURIComponent(code)}${fight ? `#fight=${fight}` : ''}`;
+    }
+    window.App.fflogsReportUrl = fflogsReportUrl;
+
+    function updateFflogsReportLink() {
+        if (!window.App.reportCode) {
+            fflogsReportLink.style.display = 'none';
+            fflogsReportLink.href = '#';
+            return;
+        }
+
+        fflogsReportLink.href = fflogsReportUrl(window.App.reportCode, window.App.fightId);
+        fflogsReportLink.style.display = '';
+    }
+
     const initialUrlState = getUrlState();
     const storedLanguage = localStorage.getItem('ff14-mitigator-language');
     const legacyTranslateLanguage = initialUrlState.translate === '1' ? 'de' : 'en';
@@ -114,6 +145,7 @@ document.addEventListener('DOMContentLoaded', () => {
         window.App.fightStart = fight.startTime;
         window.App.fightEnd   = fight.endTime;
         window.App.phases     = buildPhases(fight);
+        updateFflogsReportLink();
 
         displayFight(fight);
         explorerCard.style.display = 'block';
@@ -210,7 +242,7 @@ document.addEventListener('DOMContentLoaded', () => {
                 body:    new URLSearchParams(params),
             });
             const json = await res.json();
-            if (json.reauth) { window.location.href = 'auth/start.php'; return; }
+            if (json.reauth) { window.location.href = authStartUrl(); return; }
             output.textContent = JSON.stringify(json, null, 2);
         } catch (err) {
             output.textContent = '// Fehler: ' + err.message;
@@ -224,6 +256,8 @@ document.addEventListener('DOMContentLoaded', () => {
         fightSelectCard.style.display  = 'none';
         explorerCard.style.display     = 'none';
         fightSelect.innerHTML          = '<option value="">— Fight auswählen —</option>';
+        fflogsReportLink.style.display = 'none';
+        fflogsReportLink.href          = '#';
         allFights = [];
 
         window.App.reportCode = reportCode;
@@ -258,7 +292,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
         if (json.reauth) {
             output.textContent = '// session expired — redirecting...';
-            setTimeout(() => { window.location.href = 'auth/start.php'; }, 1500);
+            setTimeout(() => { window.location.href = authStartUrl(); }, 1500);
             return;
         }
 
@@ -291,6 +325,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
         window.App.fights = allFights;
         fightSelectCard.style.display = 'block';
+        updateFflogsReportLink();
         window.analysisTab?.onFightsLoaded?.(allFights);
 
         if (preferredFightId && selectFight(preferredFightId, true)) return;
diff --git a/templates/fight-select.php b/templates/fight-select.php
index da53a17..37db7ae 100644
--- a/templates/fight-select.php
+++ b/templates/fight-select.php
@@ -1,5 +1,8 @@
 <div class="card section-gap" id="fight-select-card" style="display:none">
-  <div class="card-title">Fight auswählen</div>
+  <div class="card-title-row">
+    <div class="card-title">Fight auswählen</div>
+    <a id="fflogs-report-link" class="btn btn-sm" href="#" target="_blank" rel="noopener" style="display:none;text-decoration:none;margin-left:auto">FFLogs öffnen</a>
+  </div>
   <select id="fight-select">
     <option value="">— Fight auswählen —</option>
   </select>
diff --git a/templates/login.php b/templates/login.php
index ef804a3..336f18c 100644
--- a/templates/login.php
+++ b/templates/login.php
@@ -21,7 +21,7 @@
       <?php endif; ?>
     </p>
 
-    <a href="auth/start.php" class="btn btn-gold btn-login">
+    <a href="<?= htmlspecialchars(auth_start_href(), ENT_QUOTES) ?>" class="btn btn-gold btn-login">
       <?= $tokenExpired ? 'Reconnect to FFLogs' : 'Connect to FFLogs' ?>
     </a>
 
diff --git a/templates/report-form.php b/templates/report-form.php
index 09da893..9f0c275 100644
--- a/templates/report-form.php
+++ b/templates/report-form.php
@@ -23,7 +23,7 @@
         </select>
       </div>
       <button class="btn btn-gold" type="submit" style="align-self:flex-end">Fetch</button>
-      <a class="btn" href="auth/start.php" style="align-self:flex-end;text-decoration:none">Reconnect</a>
+      <a class="btn" href="<?= htmlspecialchars(auth_start_href(), ENT_QUOTES) ?>" style="align-self:flex-end;text-decoration:none">Reconnect</a>
     </div>
   </form>
 </div>
diff --git a/templates/tab-analysis.php b/templates/tab-analysis.php
index dfb6d96..e1ad5ff 100644
--- a/templates/tab-analysis.php
+++ b/templates/tab-analysis.php
@@ -27,6 +27,7 @@
       <div id="ref-ext-panel" style="display:none">
         <input type="text" id="ref-report-input" class="ref-report-input" placeholder="Report-Code">
         <button id="ref-report-load" class="btn btn-sm">Laden</button>
+        <a id="ref-fflogs-report-link" class="btn btn-sm" href="#" target="_blank" rel="noopener" style="display:none;text-decoration:none">FFLogs öffnen</a>
         <select id="ref-ext-fight-select" class="filter-input" style="display:none">
           <option value="">— Fight auswählen —</option>
         </select>