[@KoL] Honestly, I think many of the Machina's greatest military victories have come from fusion powered machina. I mean, Grafdakka nuking the angelic host with his body was pretty boss. Granted, didn't achieve the objective, but was boss.

Also, Miyu's mechs definitely have their own internal reactors. She wouldn't trust to always have power being beamed to them. And she's pulled a Mini-Grafdakka before.