Well i'm gonna pass on trying to win Boundless Nemesis, lack of a mage OSB is really killing me when he hits P3, his boundless ethereal cannon spam and his aoes just makes it so I can't survive long enough for Deployment Tactics and Sephiroth's BSB Command 1 to effectively kill him before he kills all of my party. Closest I got him was 1% when Deployment Tactics wore and he killed off everyone starting with Sephiroth and Edge, leaving only the healers alive until his AOE killed them.