By default any given character can only really excel at a few facets of the game. It would be easier for us to help you if we knew what facets are highest priority for you. I'll list some of the bigger options and their subflavors ... if you can tell us the top three or four that'd be cool.
1) Damage output (melee, ranged, spells)
2) Combat buffs (self, other, party)
3) Utility spells (transportation, obstacle removal, divination, etc)
4) Skills (individual)
5) Combat debuffs for enemies
6) Healing and effect removal
7) Defenses (hps, saves, AC, evasion/uncanny, resists/immunes)
8) Pets (familiar, companion, summons, leadership )
9) Else
Thanks!
-blarg