Good luck.
... Okay, there's just something wrong if you're looking for tips here, but, I will give a few anyways. All enemies have HIGH status, which means they recover all Morale at the beginning of their turn, start in RAGE, and cannot be afflicted with statuses (except via an unconfirmed glitch). This means you have no more than two Unions to take them out; one on their turn, one on yours. A good way to take Baldus is to situation change next to him with Milanor, using your strongest card. Milanor has wasteland bonus as well as the Axe advantage. Nietzsche with Ice Javelin and Diamond Dust is good, too, Overkill on the Griffon Riders and Fatal Damage to everyone else. Aegina is best left for Roswell if you have him, but do not, under any circumstances, let her use Revolution on you as it is an instant win for her. Have fun~