One thing to note. How good is their durability? Cause if they reach the 8th floor they're going to need to be tanky. Victim sits on that floor as a last ditch effort to stop raids that go too high.

Durability to conventional attacks are probably multi city block level for a bunch of them, however to special attacks only the regenerating living weapon characters have any resistance.

One last thing to note. Do they have any resistance to hax? Cause if they reach Ainz he has a massive amount of it. Including the Wish Upon A Star ability/ring and Insta-Death abilities that bypass immunity.

It depends on if he can react to esdeath dropping a near city size block of ice on him at super sonic speeds.