I really like this idea regarding the 'sage' class. This would make dual school much more accessible. This would end up saving 15 build per collumn of each school (30/30 instead of 25/50). Depending on how the other skills (channeling, high magic, etc) were costed, it may not be enough of a difference from scholar to warrant the new class though, due to the back end (db programming, book modifications, etc) costs of adding it.Oh, and 4) the cost of dual schools.
I actually kinda agree, but I would propose a different fix. I want Earth and Celestial casters to be separate classes, rather than the same class that "makes a choice."
Along those lines, I'd also want a hybrid caster (and call it the Sage). I would take the spell slot cost of the hybrid classes, and just give it to both schools for the Sage.
This is more for my reference but could help others illustrate the effect of the change, so I am including it.
200 build in spells for a single school scholar (building column) would give 8 columns.
200 for a sage, balancing schools would be 444/444/432 and 444/444/431.
Giving the scholar 2 more eighth level spells and 5 more 9th level spells for the same cost. The sage trades top end spells for versatility.