Poll: What's the Hardest Campaign Boss in PoE 2?

Just finished my first playthrough and curious what everyone thinks. Which campaign boss gave you the most trouble?

For me it was Torvian, due to hard mechanics

Viper Napuatzi in Act3, too small arena, too much junk aoe.

Most bosses are nerfed and much easier then PoE2 lunch.
Act1 final boss now is very easy comparing to past.

Zolin and Zelina

Quite a war of attrition and physical/bleed/corrupting blood/and leech and life sharing all breaking the minions and evasion classes without armour or phys mitigation.

That always depends on the build; so each build has a different nemesis.

This time around, for me was Prince Azmadi from the Vastiri Interlude Act. He definitely wanted to be a ninja but was denied.

Lythara, the wayward spear

Viper A3 hands down - Ironically original version was easier than 0.2 version. Essentially this boss is cracked compared to anything else in the game. 0.2 version added regular rapid fire poison spears which only defense is to nuke boss down. the previous poison spear waterfall move set was manageable but now near impossible to damage boss or move fast enough.

+1 to Viper A3. She is the most consistently difficult boss encounter for me across builds. Usually it means I have to respec into more DPS because otherwise the fight just wears me down too much.

i really liked the torvian fight. it was a little like geonor in the sense that it would be a really good dark souls 3 or elden ring boss. The AOE isn't too out of hand and the boss is fast and mobile.

in 0.1 viper and monkey were very scary in hc

in 0.3 nothing, there are all pushovers now, too much power creep
there is 2-3 act 4 bosses i guess you can say are challenging ? idk i kiled almost everything on first try going in blind on hcssf and im not some insanely good player.

Some act 4 new bosses took several attempts for me, until I learned their mechanics. All familiar bosses from acts 1-3 were very easy.