S+ Tier

Hell Mode ArbiterDPS CheckHell Mode boss with true-damage ultimate. The EHP calculator's 'One-Shot' verdict is built around this boss's burst.

S Tier

Vampire Lord (Oathless)Swarm BossLeader of the Castle Vampire swarm. Aggressive melee strings and a lifesteal phase. Bring Berserk Potion for burst windows.Werewolf Alpha (Oathless)Swarm BossPack leader with charge attacks and a stun-roar. Best handled with Frost Runes for movement speed reduction.Dragon's Grave Boss (Wave 11+)Wave BossSelf-healing wave boss. Players without 30% Skill Damage cannot break its regen and will be timed out.

A Tier

Crystal Golem (Cave of the Crystal)Farming BossResource boss with high Crystal Shard yields. Lower threat level than Castle bosses but the best Crystal Shard-per-minute.

B Tier

Ruins SentinelMid-game BossRuins boss. Standard melee rotations, still face-tankable. Guards the Frostine drop node.Metal DummySoul SourcePseudo-boss that exists to drop Iron Soul fragments. 80% drop rate makes it the most reliable Soul source.

C Tier

La GolemStarter BossStarless Forest boss. Slow telegraphed strikes with zero phase shifts. Can be face-tanked with Mythril armor.