Bosses reward patience
Every boss has a pattern you can learn. The fight is won by reading the tell, not by out-damaging the health bar.
Most boss deaths come from greedy swings during recovery windows. Wait for the opening, then commit hard.
The biome bosses
The early bosses teach spacing and dash timing. Their attacks are slow enough to read once you stop panicking.
Later bosses add phases and summons. Clear the adds first or they bury your positioning before the main threat lands.
The final stand
The last fight changes the rules you relied on. Expect a longer pattern and fewer safe windows than before.
Go in with spare death defiances and a planned build. The maxing out a build page shows how to arrive ready.
Next: Death defiance usage.