Just want some confirmation on these. Please only speak from personal experience, do not cite online guides and videos.

Haukke hard mode

First boss: exactly what is the condition for spawning the big skeleton? I've heard stories that if 3 small skeletons die inside the dark circle then a big one spawns. But I've also had a fight where none of the skeletons died in the dark circle yet the big skeleton spawned.

It also doesn't seem like if there's 3 skeletons alive then the big one spawn, because I've had 4 alive at the same time towards the end and the big one didn't spawn.

Last boss: I feel that the boss eats adds if any one of these three conditions is true: (1) if the add dies; (2) if a set time passes; (3) if the boss's HP drops to a certain percentage.

The reason for this is that I've had a very high dps group AoE boss+adds all the time (SMN+BLM) and managed to kill none of the adds. The last add gave us a 8k blood rain and wiped us.

Copperbell hard mode

First boss: it seems the boss set fire to the bridge according to a timer but also according to the adds. Of the three groups of slimes, the boss will set fire to the first part of the bridge once the second group of slimes is pulled. He seems to set fire to the third part of the bridge once the last group of slimes are pulled. Anyone have experience otherwise?

I've always just pulled to the second set of slimes at the beginning. While the boss is busy making a fire, we can AoE down the two groups of slimes and be ready for the bomb. After that, we always have a loooong time we can dps the boss before he light up the second stretch of the bridge.

Second boss: the fire sprites will spawn with some enmity on a random player. Boss has 3 phases. Phase 1 is before getting hit by the first bomb, just a regular tank and spank. Phase 2 he will cast a straight-line room-length AoE at whoever has aggro. Phase 3 he puts down blue fire on the ground. Seems in this fight, after the first bomb, it's best that the tank be doing the bombs and everyone else remain on the other side of the room and take care of sprites.

Last boss: two waves of adds spawn here, first wave is just one giant, the second wave has two. These adds seem to fixate on a party member, and will ignore all enmity. Has anyone successfully tanked these before?