I'm not understanding the "enchantment matters" (Mesa Enchantress , Silent Sentinel ) stuff with only nine enchantments in the deck. It seems a bit random and lacking synergy with the rest of the deck.

I'd suggest more instant-speed methods of taking your opponents stuff, such as Commandeer and Twincast . Also, it's really useful to have huge threats of your own in case your opponent has a ridiculously janky deck. You have a couple in here, such as Memnarch , but nothing that really interacts well with your copy effects.

Rune-Scarred Demon , Thopter Assembly , and True-Name Nemesis are all decent threats, and I can always clone them if needed to increase threat potential. You have a good point about the enchantress, she's out of place, but the Sentinel helps bust through enchantment removal by bringing them back, and again is cloneable.

I didn't focus on being able to copy or steal instants or sorceries simply because they aren't very common in my meta, but I'll take a look at what I can shuffle around to make room because you've got a good point.