Larmiun Dol'Uten:
Do spellcasters get only the best spell slots from one of the gestalt sides?
I'm concerned about balance.
Yes a Druid/Wizard the only one I see off hand, but I've not finished looking up the classes, would have different spell slots and different spells for each class. However one class has divine spells and the other has arcane spells. (page 73 of Unearthed Arcana makes that clear).
I suppose if I modified my ruling above to be in the same spirit then you would need to keep separate power points and separate power lists for each psionic class. Earlier I was going by page 72 and Power Points/Day and Known Powers would be the same ability by two different classes which means you'd accrue them at the rate of the better class not both. If we take psionics to be a type of spellcasting then we could use the page 73 rule and see how it goes.
Would that be satisfactory?