Difficulty of act bosses

[Yogi_Baar]

I have about 55 fire and 73 lightning res on my clvl 27 assy.  If I get to 30 before I face him, do you think I will be ok?  And what about in the rest of the chaos sanctuary?

If I were you I'd shop for some fire res equipment for the fight. It's cheap, and it comes on all parts of the equipment, so you can just switch some part of your equipment that's without resistances. I'd also keep some good resist jewelry (as AS mentions I think). You never know what you'll need later in the game. Don't cube/sell it all.

I think that you'll do OK at clvl 30 (with more fire res :P). All my chars survive him when they're below 30, and I'm not that good a player. I just can't think of an assassin that wouldn't be able to take him, since Blade Fury is a standard nowadays.

I've never had any problems with the rest of the Chaos Sanctuary, except of course the infamous Iron Maiden curse. One of my assassins almost kicked herself to death once. Eww. Just be careful with melee attacks (some ranged blades might help ;)) and you'll shine.

EDIT: I saw your "When to face Diablo" thread, and I suggest you put some stat points into Vitality. I try to get life to at least 250+ with ranged chars and 350+ with melee chars, but then again I play HC only so I have to be paranoid.