diff --git a/libs/gw2_analytics/src/gw2_analytics/ei_compare.py b/libs/gw2_analytics/src/gw2_analytics/ei_compare.py
index 087c5f62..8d578aa6 100644
--- a/libs/gw2_analytics/src/gw2_analytics/ei_compare.py
+++ b/libs/gw2_analytics/src/gw2_analytics/ei_compare.py
@@ -11,6 +11,7 @@
 from gw2_analytics.initial_buffs import extract_initial_buffs
 from gw2_analytics.rotation import build_skill_rotation
 from gw2_core import (
+    Agent,
     BlockEvent,
     BoonApplyEvent,
     BuffApplyEvent,
@@ -236,7 +237,10 @@ def compare_elite_insights(  # noqa: PLR0912, PLR0915
     agents_by_account = {
         agent.account_name.lstrip(":"): agent for agent in fight.agents if agent.account_name
     }
-    agents_by_instance = {agent.instance_id: agent for agent in fight.agents if agent.instance_id}
+    agents_by_instance: dict[int, Agent] = {}
+    for fight_agent in fight.agents:
+        if fight_agent.instance_id:
+            agents_by_instance.setdefault(fight_agent.instance_id, fight_agent)
     agent_ids_by_instance: dict[int, set[int]] = defaultdict(set)
     for fight_agent in fight.agents:
         if fight_agent.instance_id:
@@ -298,7 +302,7 @@ def compare_elite_insights(  # noqa: PLR0912, PLR0915
             continue
         account = player["account"]
         instance_id = player.get("instanceID")
-        agent = agents_by_account.get(account)
+        agent: Agent | None = agents_by_account.get(account)
         if agent is None and isinstance(instance_id, int):
             agent = agents_by_instance.get(instance_id)
         if agent is None:
@@ -362,6 +366,13 @@ def compare_elite_insights(  # noqa: PLR0912, PLR0915
                 for event in event_list
                 if isinstance(event, DownEvent) and event.source_agent_id in agent_ids
             ]
+            outcome_downs = {
+                event.time_ms
+                for event in event_list
+                if isinstance(event, CombatOutcomeEvent)
+                and event.outcome == "downed"
+                and event.target_agent_id in agent_ids
+            }
             defense_values = {
                 "damageTaken": sum(event.damage for event in taken),
                 "damageTakenCount": sum(_connected(event) for event in taken),
@@ -379,36 +390,30 @@ def compare_elite_insights(  # noqa: PLR0912, PLR0915
                     isinstance(event, DodgeEvent) and event.source_agent_id == agent.id
                     for event in event_list
                 ),
-                "downCount": len(
-                    {
-                        event.time_ms
-                        for event in event_list
-                        if isinstance(event, BoonApplyEvent)
-                        and event.kind == "apply"
-                        and event.skill_id == 770
-                        and event.target_agent_id in agent_ids
-                    }
-                )
-                or (
-                    len(downed)
-                    if anonymous
+                "downCount": (
+                    len(outcome_downs)
+                    if outcome_downs and not anonymous
                     else len(
                         {
                             event.time_ms
                             for event in event_list
-                            if (
-                                isinstance(event, CombatOutcomeEvent)
-                                and event.outcome == "downed"
-                                and event.target_agent_id in agent_ids
-                            )
+                            if isinstance(event, BoonApplyEvent)
+                            and event.kind == "apply"
+                            and event.skill_id == 770
+                            and event.target_agent_id in agent_ids
                         }
                     )
+                )
+                or (
+                    len(downed)
+                    if anonymous
+                    else len(outcome_downs)
                     if not has_downed_buff_applies
                     else 0
                 ),
                 "downDuration": sum(event.downtime_ms for event in downed),
                 "deadCount": sum(
-                    isinstance(event, DeathEvent) and event.source_agent_id == agent.id
+                    isinstance(event, DeathEvent) and event.source_agent_id in agent_ids
                     for event in event_list
                 ),
             }
diff --git a/libs/gw2_analytics/tests/test_ei_compare.py b/libs/gw2_analytics/tests/test_ei_compare.py
new file mode 100644
index 00000000..2eca44dd
--- /dev/null
+++ b/libs/gw2_analytics/tests/test_ei_compare.py
@@ -0,0 +1,113 @@
+from __future__ import annotations
+
+from typing import Any
+
+from gw2_analytics.ei_compare import compare_elite_insights
+from gw2_core import (
+    Agent,
+    BoonApplyEvent,
+    CombatOutcomeEvent,
+    DeathEvent,
+    EliteSpec,
+    Fight,
+    Profession,
+)
+
+
+def test_compare_elite_insights_keeps_first_anonymous_agent_for_shared_instance() -> None:
+    fight = Fight(
+        id="fight",
+        agents=[
+            Agent(
+                id=1,
+                name="Chronomancienne",
+                profession=Profession.MESMER,
+                elite=EliteSpec.CHRONOMANCER,
+                is_player=True,
+                instance_id=3994,
+            ),
+            Agent(
+                id=2,
+                name="Virtuose",
+                profession=Profession.MESMER,
+                elite=EliteSpec.VIRTUOSO,
+                is_player=True,
+                instance_id=3994,
+            ),
+        ],
+    )
+    expected: dict[str, Any] = {
+        "players": [
+            {
+                "account": "Non Squad Player 5",
+                "instanceID": 3994,
+                "name": "Chronomancer pl-3994",
+                "defenses": [{"deadCount": 2}],
+            }
+        ]
+    }
+    events = [
+        DeathEvent(time_ms=1, source_agent_id=1, target_agent_id=0, skill_id=0),
+        DeathEvent(time_ms=2, source_agent_id=2, target_agent_id=0, skill_id=0),
+    ]
+
+    result = compare_elite_insights(fight, expected, events)
+
+    assert result["differences"] == {}
+
+
+def test_compare_elite_insights_prefers_outcome_downs_for_named_players() -> None:
+    fight = Fight(
+        id="fight",
+        agents=[
+            Agent(
+                id=1,
+                name="Player",
+                profession=Profession.MESMER,
+                elite=EliteSpec.CHRONOMANCER,
+                is_player=True,
+                account_name=":Player.1234",
+                instance_id=1111,
+            )
+        ],
+    )
+    expected: dict[str, Any] = {
+        "players": [
+            {
+                "account": "Player.1234",
+                "name": "Player",
+                "defenses": [{"downCount": 1}],
+            }
+        ]
+    }
+    events = [
+        CombatOutcomeEvent(
+            time_ms=100,
+            source_agent_id=2,
+            target_agent_id=1,
+            skill_id=42,
+            outcome="downed",
+        ),
+        BoonApplyEvent(
+            time_ms=100,
+            source_agent_id=0,
+            target_agent_id=1,
+            skill_id=770,
+            duration_ms=2_147_483_647,
+            stacks=1,
+            kind="apply",
+        ),
+        BoonApplyEvent(
+            time_ms=200,
+            source_agent_id=0,
+            target_agent_id=1,
+            skill_id=770,
+            duration_ms=2_147_483_647,
+            stacks=1,
+            kind="apply",
+        ),
+    ]
+
+    result = compare_elite_insights(fight, expected, events)
+
+    assert result["differences"] == {}