What debuffs work on the Pit Fiend?

[CrimsonEagle]

That is my question to the guru's. What debuffs work on the Pit Fiend, weapon inflicted or spell inflicted?

Hamstring?
Curse?
Shattermantle?
Cripple?
Exhaustion?

There are just to many to list that may or may not work. Is there anyone out there who has a relatively definitive list, or has there already been a list that has been posted that someone can point me to?

Thanks in advance!!!

Crimson.

[Lithic]

I read somewhere that he was immune to curse, though I wouldnt bet my character on it. Ray of enfeeblement/exhaustion and waves of XXX work on him.

[Shade]

All no-save debuffs work.

So ray of enfeeblement, rayof exhaustion, waves of exhaustion, waves of fatigue
Also the -2 dmg from solid fog should work, altho he will not slow down movementspeed wise.

All purple named monsters are imune to movement speed decrease effects. So while hamstring, cripple, acid fog, etc will show in his bio as working - he will not slow down.

Save type debuffs are extremely difficult to land due to his incredible will/fort save, so they land 1 in 20 - when you get thru his SR.
I've only managed a couple tho while spending an insane amount of mana trying:
Crushing despair
Symbol of pain

He is indeed oddly imune to curse. Easiest way to tell that is with a cursepewer, can hit him well over 20 times and he will fail a save eventually but not become cursed.