Wow! Thanks guys for such wonderfully thought-out responses. I do appreciate all of them for what they offer.
I'll give a little more information about the problem we're facing: our current trio is *kind of* in hell mode. I say kind of, because our 4th time trying to beat the throne room/baal on nightmare, when we had finally beaten the throne room and had enough rejuvs to finish off baal, our nova sorc got a fatal error when picking up a potion. And he was the host. I told him not to push anything though and me(barb) and the necro were able to finish off baal with like 3-4 pots to spare. After it was all over, though, the sorc didn't get the quest and is still in nightmare. UGH.
The physical immune boss, the giant skeleton one, is ridiculously hard compared to the others. And it seems about 50% of the time he is also lightning immune. That 100% kills our team right there. We have to just rehost after making it so far and hope he isn't lightning immune the next time.
I'm currently taking pretty much all the bosses by using those unique djinn swords (don't remember) with 4 slots and filling them with skulls just so I can stand toe-to-toe with the insane dmg output of the act bosses. When those things start to fail, I don't know what we're going to do.
Oh, also, myriddn, I do consider myself pretty hardcore
I just can't devote too much time to this and so was wondering if there were some builds we had neglected to consider.
I'm currently about 2500-2600 diamond zerg in starcraft2 and our necro had a lvl 90 HC on battle.net back in the day. And our sorc was on my 4v4 halo team when we were one of the best teams in the nation. So, anyway, it's a hard mod! haha, cheers, and thanks again guys.