[Neus]

Yes, the system allows every skill to have its own cooldown time, it's not 3 or bust. Some of the skills have high momentum costs to offset their power, so you need some setup and give someone a chance to react/position accordingly. But I don't think there'd be a problem with some of them having lowered Momentum costs in exchange for having multi-turn cooldowns, especially when some of them do have high Momentum costs because of the fear of spamming it.

The current implementation is just experimental to see how the concept worked overall. It doesn't have any detailed number tweaking.