You've listed your powers without a theme. Latter powersets were implemented with secondary mechanics - you know, dual blades has combo system, other sets have other side-effects going on.
What's the secondary mechanic? The overall concept: A reason why the power suit is different from the other defense sets. What's it's Unique Selling Point? Does it have a battery that charges up as you get hit and discharges when it's full, for example? Or does it have a battery that starts a battle at full power and runs out of juice as you get hit, somehow regaining charge in another way?