keep in mind that u must hv a good healing team. Other unions should be able to heal themselves. Rejuvenating water and kiss of life are important for this battle because the enlightened seven are much harder than the six bases. Although there are no minions, the boss can wipe out all ur unions completely if u r careless. Arcana such as blackout/whiteout and weapon art are helpful, they are all powerful art. As long as u can survive their special arts, u should be able to defeat them.