Regarding Magus's spells, based on feedback, I want to take the spells from 18 to 16 and I guess lower the MP cost to 6. For the sake of consistency, I think it would be fair to increase the other characters' similar spells from 14 to 16.
To some extent, Magus deserves stronger magic, but he gets that automatically from having a relatively high Magic rating. Granted, "fixing" the level 2 spells hurts Magus, but I think that imbalancing could be offset by "fixing" the ultimates. Magus has the weakest magic attack ultimate (Dark Matter has a base power of 38, whereas Shock has 40, Flare has 42, and Luminaire has 50), so bringing all of the base powers to the same quantity (say, 42) would help out Magus.