While I think it's a neat thing, I also think that it's currently a bit misplaced, as those synergize with weapons. I mean, add +5 MP/+4 RP per rank (half of what a combat destinity gives) and I'm totally on board to take it for my Arcane Archer. Without... Little spellpower hidden in the cores that only synergize with a caster using elven AA, no enhancements that buffs weapon combat, other problems.