Marc's first campaign level has both Peat and Kai in the level so that helps a bit, but it is also a split stage, so don't expect standard chasing tactics to be nearly as effective. Keeping that in mind, Here and There can be good. As your defenses are rather weak under Cast Off, it's a good idea to bring targetable damaging cards like Long-Distance Shot or even Cloud of Seagulls, as long as it hitting you wouldn't be too much of a detriment. Your +2 attack makes attacking cards not as much of a necessity as Pudding. This is also very riggable in multiplayer as long as you have players willing to cooperate.
Only KOs made while under the effects of Cast Off count towards the achievement.
Both of NoName's forms count towards the achievement.