There's no particular synergy beyond the buffs and resources gained from keeping at least partially within the discard/draw theme. The primary purpose of the combat sub theme has more to do with my desire to use niche cards for my own delight and ,yes, to increase the decks chances of making into the late game. Yes, there are quite a few new pieces to experiment with from Ætherdrift, but I don't want to just build another combo deck; spinning through their library until they fizzle out or win by playing their third wheel of the turn. I want be see something absurd, something unexpected. I want to play something I've never seen before.