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
Ever wondered why the Yu-Gi-Oh cards in the anime look so different
If your TCG leanings echo those of the video games, you'll want to kick some fireballs with a few of these pals, and while admittedly Cinderace V and Cinderace VMAX are (unsurprisingly) the better representatives, surely you can make room in a deck for a Shiny Vault spin on the standard-issue Cinderace
+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
The Temur make use of one of red's most iconic creature types, with Dragons a large part of their gameplan
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