[Autumn]

I once tossed around the idea of Shine Knights summoning a 3rd member to the crew, a caster type that can provide some DPS and round a few things out, it would allow you to keep it's strength when spirited as well. I also agree that they should gain momentum when summoned, the move is incredibly lack luster for a 15m spell, and instead of taking away our only rank C invocation I'd rather just make it better personally.

The caster in question should probably have some basic priest spells like Holy Spark, Holy Arrow, Graft and the Treatment skills.