hmmmm built my S rank Shiki Kai today... gotta say, it's really nice...
Base def is pretty high+infighter makes it kind of buffy, yet it's not a slow unit at all. The beam gattling does a ton of damage and fires fast, the missiles and the kd beam are kind of an afterthought though. Alt mode's melee has pretty good range for a paper unit, but only 3 hits, and the beam rifle is decent. I'll see how it becomes once it gets skill 2