hmmm hard to judge...will the character be in a party with other clerics to buff, warriors to buff and tank? or solo? and what do u mean by better?? tanking or killing?
but i think wizard takes all...
PvP: with cleric bless and heal..wizard would usually win fast..with good robes tho, but warlock is the most fun

GW/FW/group PvP: same thing...wizard would be unstoppable with bless, warrior buff, earth barrier, and healing cycle/recovery division. cleric would be the most useful tho
Jobbing: wizard again...warlock is ok..cleric is ok..
Uniques: usually in my 8man euro party....it's ALWAYS the wizard who gets the kill
