@wfain I've been messing around with your list minus Libraryand 1 Dork and am trying running impactful 3-drops to follow up a countered survival. The only two I really found were Dack who plays great with all the creatures and Leovold as a straight hatebear against Bargain storm and PO decks which are very hard to win vs if we don't explode.
Shops tho no matter what seems unwinnable. Kataki helps but fetching for white then drawing looting sucks and ballista makes sure birds are never around. Ingot chewer isn't good enough when they board into an aggro plan and flood the board so maybe try and jam energy flux's like landstill with ingot chewers to clear spheres? Or is EoT Hurkyls and try and play like storm the plan?
Teeg also seems really bad vs PO decks as they just go turbo tinker mode and win with blightsteel which teeg doesn't stop.