Iron Golems are especially the bane of casters existence if you can't strip immunity. I am not even joking on a FVS you have to turn off your Draconic mantle, and then you see something is still procing fire, so you start stripping off gear, and then *maybe* if you dump 5K spell points you can kill them with light spells. I swear I don't know if the mantle was bugged, but I basically had to drop the quest in Von 4, something was fire healing the golem and I could not figure out what it was.