nimrod use the rangers hail of arrows in conjuction with annoint works better.. i prefer avuing 4 different classes so i can use all the different armors.
yhe warrior makes the best tank. and with execute means he can kill 1 person free of charge.. or if they have a lot of firepower he can do shield wall. level 21 and my warrior has a deamage reduction of 93 percent (without potion or spells). the ranger is the beest damager in my group thats why hes in otherwise it would take too long
in surviovor buffs are awesome coz u have them for every fight so make sure foduring the fight u leave the enemy live whilst u buff everyone up.. debuffs are pretty bad like curse so u might have to get purify or be lucky with benediction.
for me the best in survivor mode is 1 warrior i conjurer 1 cleric and 1 warrior. conjurerer summons something mana sprite or wargolems (pick one) whichever then does the armour protection. (and call soul to cleric if he dies )spell to everyone. cleric heals and raises people. (tho purify might be a must to stop curse). warrior on his own up front. and the ranger coz hes some awesome buffs (like the regen one makes u immune to poison as well) and swiftness everyone is faster. and hail of arrws (combined with cleric anoint spell makes it awesome)
the warrior class is awesome just maximise hi armor by giving him tower shields and thick items. and he cant die. (weakness is thos creatures that ignore armor) also every level increase his endurance now thats a tank. give him execute every so often he kills people. he doesnt need to do damage.
clerics are good rangers are too thieves are ok.. conjurers are good.. barbarians are crap.. mages arent that good.