Stabilizers & spot answers: Windborn Muse, Wall of Reverence, Stroke of Midnight, Riot Control, Dramatic Rescue
I honestly cant say how the AI involved in this process compares to Hearthstones - which has improved a lot over the last season or two - but it didnt do anything too obviously silly
I suspect this wont be quite good enough, but it does have some good properties: a lot of cards you want to hit like Sheoldred you still get a meaningful impact even if tapped
Traveling Chocobo would be great just with the doubling effect, but it comes with the added bonus of being able to play lands and cast Bird spells from the top of your library
The deck is essentially Mono Black Control with a Spellslinger twist, running a ton of instants and controlling the board with removal spells like Snuff Out, Liliana's Triumph, and Force of Despair, drawing cards with Dark Bargain, Necrologia, and Wretched Confluence, generating a ton of mana with cards like Crypt Ghast, Cabal Coffers, and Nirkana Revenant, and eventually winning the game by stealing opposing creatures with Thrilling Encore or going for the Chain of Smog + Professor Onyx combo