VirgilCaine said:
A 5th level character (a cleric or paladin most likely) could do okay.
A 5th level ANYTHING is going to have a SEVERLY hard time by themselves in room A80.
It would go something like this...
Player: I walk into the room.
GM: OK, you aren't suprised because you heard flapping noises. Roll initiative.
Player: 28!
GM: OK, great. You see a hoard of batlike things flapping around. Look alot like the stirges that have been attacking you.
Player: I attack/fireball/shoot/whatever some.
GM: OK, you killed 5 of them...now you get an AoO as they fly in to attack you.
Player: *kills another stirge*
GM: *rolls 16 touch attacks as the stirges swarm the unfortunate character*
Player: *grapples a stirge off him/herself*
GM: OK, the 7 stirges that grappled you drain *rolls* 17 CON. Oh, and the others attack.
Player: Head for the chopper!!!!
Any way you slice it....22 stirges is rough...for any solo creature.
I'm not saying it can't be done, but if you are going to just start a higher level then that pretty much invalidates the question. I am pretty sure that if you ran Orcus through the adventure he would not only survive, but end up having half the dungeon as his personal army on the way out. At some point, no matter how far advanced you start as, you are going to end up in a section that is above your head and was designed for a party, not an individual.
Let me know how it goes, though.
DS