I've been running this playthrough, and I highly recommend it. Makes combat very challenging.

1 rogue.
1 ranger.
1 warrior.
Hard Difficulty.
No magic on anyone, period. Scrolls are allowed.
No Glass Cannon. No Leech. Lone Wolf and Zombie are allowed.
Don't abuse stealth (ie don't put it on everyone)
Don't abuse rubies (max of 1 per character)

If one or more of your characters dies in combat, you must try to salvage the fight. Even if that means running away, healing, and coming back to resurrect them. Don't just reload the first time something bad happens.