24 often takes me a few runs to get right but overall it's not so bad. The worst floors imo are both in T2 tower, floor 45 and floor 49. 45 is just a huge pita if you're not ranged because the ground is often spammed with circles, and getting hit once often just leads to a 100% death, so you have to spend extensive time just dodging which makes it hard to get dmg in. It was really fucking annoying on paladin due to being both melee and a support.
49 I just hate because while T1 50 wasn't so bad, the golems around the arena just make everything way fucking stupid, you get caught once and you just get ping ponged all over the place and you have to pray you get moved into a spot that's not going to result in just dying. It's too RNG, and it also severely punishes character with long animations and/or slow movement, since it's very hard to dodge the circle and not get clipped by golems with min speed, and you have to do it a ton of times if you can't unleash a bunch of dmg. This one was ironically easier on Bard/Paladin since I built mine with swiftness and they have pretty strong burst. It's also really fucking stupid on classes with big effects, on sorc it was really annoying because I couldn't fucking see what he was doing if I used certain spells. I swap engravings to spirit absorption on that one to make it less shit, and keep ult to burst him down in the last bit.
T2 50 I also usually spend a few tries to kill but at least I find it enjoyable, there isn't too much bullshit, besides "charge into a wall, then turn around and do the 90%dmg beam swipe move" which is really fucking stupid.
T1 tower overall I'd say is fine, there's a few gotcha floors but it's all pretty easy, it's just super slow going with all the floors that are just "trash mobs spawn for 2mins".