[Edi]

A Ghoul Mage would be interesting. I also like the master illusionist, since there is currently no air-based rainbow pretender.

For oriental/Arabic type nations, a Djinn or Efreet pretender would be cool. Probably a mid-level SC with decent magics. Primaries would be air for djinn, fire for efreet, secondary could be either astral for both or water for djinn, earth for efreet.

A Lord of the Volcano would be another possible earth fire combo, but this one would have to be on the Titan/Giant Humanoid template and a rather expensive one given how good the earth/fire bless combo is. It could also offer a good alternative to the blindingly obvious Moloch-only option for fire bless effect.

Edi