So, basically Assassination is more or less a cakewalk, while Outlaw and Subtlety suffer for the lack of actual reliable toolkits that make the challenges artificially harder for no reason at all.
I'm not saying they're too hard - i kinda nuke them at this point, but having to manually slow three adds while other classes can just passively do it or having an AoE fight where blade flurry is actually best turned off tells a lot on the actual challenge design.
GZ to everyone that did them. I think i'd be able to do them if i actually wanted to put some sensible effort on them, but honestly i don't see the point right now. Maybe it's just not content for me.