Malachai is the final boss of Act 4 and a significant step up in Path of exile currency difficulty. This encounter has three phases, each with increasingly dangerous mechanics.
Phase 1: In the first phase, Malachai is accompanied by two bosses, Piety and Shavronne. Focus on defeating them first, as they can deal significant damage and have their own mechanics. Once they are down, concentrate on Malachai, avoiding his telegraphed attacks and blood circles.
Phase 2: In the second phase, Malachai gains new abilities and will periodically retreat to the center of the arena, becoming invulnerable. During this time, he will summon minions and use deadly slam attacks. Keep moving to avoid the slams and clear the minions quickly.
Phase 3: In the final phase, Malachai's abilities become even more dangerous. He will summon hearts that need to be destroyed to cheap POE currencymake him vulnerable. Focus on the hearts while avoiding his powerful attacks, then deal as much damage as possible when he is vulnerable. Repeat this process until he is defeated.
The Wall