Oh I didn't know those things didn't respawn. I thought they did. That would make it a lot better. They funny thing about that boss is that I had no problem beating it, but the first time I got it down to like 3% hp, fucked around and tried to heal and got smoked. I just started laughing at my stupidity.
The statues seem to be considered environment, and only respawn when you die.
The boss just annoyed the hell out of me the first couple of times I fought it. Cleaver lands a foot from your cape? Flattened. Range on the enrage mode smoke shit? double what you can see. Roll past the knife, but clip his body in his charge attack, full damage.
Strangely, I took out the Iron king second try without having to heal, smelter knight on my 2nd try with some healing, so I seem to be ok on bosses that other people seem to take issue with. (shit, I even killed the snake woman without draining the poison... that sucked. it sucked even more when I found out that it could be drained.)