[frogspawner]

To clarify, a 15fp Magic Missile (i.e. expanded twice) would do 3 dice of damage, but a 15fp Fireball (not expanded) would do 1 die?

Also, I'd suggest that school-skills should all contribute individually to the Spell Buffer, so you don't have to worry about the odd %'s, only when any skill crosses a 10% barrier.