[Kameron8]

Combination fighter seems to reduce the momentum cost of your skills before performing them. So, although the tooltip says you need 3m to use your first skill, you will only lose 2. The skill after that will claim to cost 2, but only cost 1. Further skills continue to cost 1. Therefore, instead of having momentum cost scale down as 3m 2m 1m 1m, it becomes 2m 1m 1m 1m 1m 1m.

Furthermore, Combination Fighter's 'minimum damage' of 50% does not apply. It can stack indefinitely, causing well over -100% damage if you cast enough soldier/reaver skills.