Rhakzan is taking suggestions / requests for spells. He's a wizard with a relatively low caster level, but pretty wicked save DCs. His BAB is medium-ish. His strongest attack though (with the highest DC), is assassination.
For example:
--Time Stop (Gives you your three rounds of study... )
--Travel Spells (We'll likely be needing plenty)
--Summon spells (Summon 7-9 will seriously slow down non-epic mooks)
--(Quickened) Black Tentacles
--Power Word spells
--Reaving Dispel (CArc)
--(Quickened) battlefield control spells (Clouds & Walls)
He's already got travel spells and battlefield control spells. Summon spells and black tentacles seem sort of weak if we're facing CR 30 foes, but maybe... Power Word spells are subject to SR, what I'm trying to avoid. He gains no benefit from Reaving Dispel (caster level too low).
If Rkhet allows the timestop use Rhakzan will take that. But what to do against air elementals? What are the best no-sr direct damage spells? Orb of acid/fire/electricity/sound/cold? 15d6 isn't great, but at least it's something. Anything else?