My Fire Summoner - Critiques Appreciated ^.^ (updated for OB)

Update, just beat normal difficulty.

Level: 37
Hp : 503
Mana: 428
ES: 344
Fire Resist: 56
Cold Resist: 60
Lightning Resist: 54
Chaos Resist: 24

Gear:

Build:

Strategy:
Cast a Summon Skeleton spell totem, Enfeeble enemies, Cast Firestorm repeatedly until they are dead, use Cold Snap to freeze enemies, Ice Nova if they rush me. I have 4 zombies and 1 spectre to tank while the spell totem gets my 8 skeletons into play.