Well it if u wanna 1hit everything then go wiz/cleric or bard if u wanna have bit fun while grinding in parties go warlock/cleric.
With wiz its quite boring if u die all the time to 5lv lover monsters

Ofc the cleric subclass will help bit, but its lot of easier exp with warlock/cleric when u can grind on ur own lv mobs with out getting killed all the time.
And pets like wolf or something will help europe chars alot when he can tank better than u also got better defence + hp..
There is Good guides for the wiz/cleric and warlock/cleric
[GUIDE] HUGE Warlock Sub-Cleric Guide! v. 3.0 [GUIDE] The Complete Wizards Guide v1.4Also if u solo grind alot, the rogue would be good choise for u.
Comprehensive Rogue Guide [COMPLETE!]