Yeah, I think I'm finally done with this. Was already losing interest some, took a vacation over the weekend and broke my 4+ month long login streak, and now I've had three straight days of level 1 rewards, so that isn't tracking correctly. Go to attempt the final level of the prologue again with the team I beat it with previously (only has Xenon in it) and the game takes my energy, starts the battle, then says "Fails to meet unit constraints" and crashes. Nevermind that at no point does the game even say such a constraint exist, to actually take the energy and then do the check is insane. I had a lot of fun with it over the summer, but after a while it becomes an endless cycle of running metal parades for levels and farming evolution units, which makes all the rest seem pointless.