It looks like you guys are short on melee (Is the Ranger Melee or Ranged?) to help balance out what seems to be some serious arcane focus by your group..
So how about working towards the Holy Vindicator PrC?
Its a strong melee-oriented divine class that Clerics and Paladins (And Oracles who can channel) can go for, found in the Advanced Player's Guide. Prereqs are:
- BAB +5
- Ability to Channel Energy
- Knowledge (Religion) 5 Ranks
- Alignment Channel or Elemental Channel Feats
- Ability to cast 1st level Divine Spells
This will allow you get the class at level 8, hindered only by your BAB. The class itself features full BAB, d10 HD, Full stacking of class levels for Channel Energy, and other tanky/healy type abilities. And you only lose 3 spellcaster levels by doing so, which means you'll still get 9th level spells.
What are your attributes and what feat did you pick at level 1?
And.. I'm curious how you guys played out starting at level 0.. sounds interesting.