Impossible, Mage - No unit loss.

[McSwan]

Dam, that armageddon + black dragons sounds like a good strat.

You'd need to be able to time back level 5 dragons though, so I'm guessing at every level up of the "time back" spirit, you always chose time back. Sounds like a "1 strat kills all" ability, and it'd be quick for most battles. Plus your spirits would level fast.