Go ahead and pick Strike but remember it's versatility may be a bit hampered in actual use so I'd think going with a different suit would be better. But that's just me do as you like Strike is a pretty good unit. It can at least fly and handle itself decently well in melee unlike my Calamity.

I'm personally done with Mr. Stone. He's more or less the Mu La Flaga of the group in terms of piloting ability.