I've been fairly on task here when it comes to looking at just the graveyard stuff in relation to the Doc, but there are at least a few other versions of the deck you could brew, and with how hard it was to cut even some of the mediocre adventure cards, I wonder if I went in the right direction
You can only use this effect of "Curse Reflection Doll" once per turn
Perception Bobblehead, revealed yesterday during the launch of the MTG Fallout spoiler season, for example, has a secondary ability that can cast a spell with mana value three or less from the top of your deck
Mimeoplasm, Revered One (Showcase Fracture Foil) I love this as a fun graveyard strategy in Commander, and of course that art is something to behold
+1/+1 counters synergies are plentiful, and there are at least a dozen at three mana value or less that you want to nix from the board as soon as they come into play, if you can
equip this card from your field or GY to it