Plane Sailing
Astral Admin - Mwahahaha!
Forrester said:
That is EXACTLY how specialized he is -- he can't use wands or scrolls of any of the other schools. That's one helluva limitation.
Right, we're singing from the same hymn-sheet now

Spells known is normally the PITA for Sorcerers, so you could "double" the number he can learn at each level, with the proviso that he can't get more than the max at each level... so if there are only 7 conju+divin spells at 1st level, he can't get more than 7 (although he could concievably *research* new ones).
As an additional benefit, I would say that he knows his subject *so well* that he can cast metamagic on the fly for his spells without turning it into a full-round action. He can even use the quicken feat (if he gets it) on his spells too.
The latter is a powerful addition to his armoury, and would match up with his greater specialisation. He doesn't have to "think so much" about changing his spells with metamagic. Plus, how many sorcerers would kill for the opportunity to quicken a spell now and then?
Cheers