Yeah, there's plenty of room to play around with cards in this deck. Mindgate is but one possibility of many.
I use 34 of the same cards as the OP, but I replaced the 6th Shard of Gratitude with a Bloodsucker (Dark and Death quanta to spare). It sounds like a bad idea, but it's actually been pretty helpful in lowering the number of losses I get to some of the "easier" FGs (and surprisingly, it's gotten me a couple of wins against Dark Matter I wouldn't have gotten otherwise).