This looks like an interesting idea. A little while back I got bored with the usual diet of MFing/building tired old characters, so I made a HC Classic Blizzy (currently parked at Act IV Hell, waiting to get the courage for another shot at the CS). Gotta say, it is a lot of fun to play classic but I think your idea of doing it as a group is a good one, life without a merc can be a real pain in the ***.
Some advice: My limited knowledge of classic tells me one thing, you will need at least one tank (Barb/uber-Valk/uber-Golem) and one character who can deal heavy damage. I know you are wanting to do something new but if you can stomach the idea of making a Hammerdin/Blizz Sorc/LF Zon, I think one of those three would certainly help your cause. Also, finding a high damage 1H weapon for melee chars can be annoying (I've been running Memph looking for a gg axe/hammer for a while now and still no luck), so I would choose a mastery that lets you use weapons which already have good natural damage and can go 2H (Axe or Mace).
Good luck and I hope you guys make it all the way to the end
