[Poruku]

I think a drawback would be required if you don't have the skills already, perhaps the drawback could be unique to each ability. For instance it could put a cooldown on sheath sword, but increase eclair lacroix's fp cost (sheath sword costs basically no fp).

Alternatively, could buff the skill if you already have it equipped. But I think overall there needs to be some benefit to already having the skill otherwise it favors people who use the non-conventional classes. Though I guess saving SP is still nice