[Klorox]

Aerich, you're right. My Monk is a Deep Gnome Monk, optimized as a Decoy. She's only got an 8 STR, and I do use the mod that applies Weapon Finesse to unarmed attacks.

I was actually considering Blind Fighting, though. If an invisible monster attacks you (I know, it only happens once that I can think of), then you don't lose your DEX bonus to AC. With a (projected) 26 DEX, this could really be significant.

I might go for Dirty Fighting, based on your statement that it's probably at least as useful as Toughness.

I probably won't go for Great Fortitude. It's the least used saving throw, and you need to actually be hit by a spider to need to make a Fort save, which hopefully won't happen very often. The Monk has great saves anyway.