2 players, to be efficient you need a sorc for tele
then, 2nd char could be :
barb for BO/tank/find item (the barb wont do much killing but he distract monsters, leap, and give you 50% extra drops and BO that other chars cant procure)
Hdin for tank/high dmg (good overall even without tele)
Necro for lower resist/corpse explosion/few summons to tank (very fast once a monster is dead, can also use attract to neglect all dmg)
Druid for oak/summons used to tank (not the fastest but impossible to die, mostly used for hardcore)
Those are tier 1 ladder chars
others are tier 2-3 but anything with a sorc works easy
Edit :
I like to do speed run with a naked necro. Easy to finish the game in 1 day without picking a single item (except for your merc)
Use attract to kill the first monster while they cant reach you, then CE+amp kills the whole screen.
You dont need to lose time to lvl up, just run through norm and nm using attract to avoid all monsters, all you need is lvl 20 CE, 1 pt in attract and 1 pt in amp, a lvl 20 necro can solo hell chaos easy haha
A single point in life tap and your merc can't die vs any boss, he just need an item with crushing blow and the game is over.
This post was edited by SinsOfTheSun on Dec 10 2017 10:17am