After playing with a few different miracle decks the last few weeks using Zephyr and Nomi I've come to the realization that it shouldn't matter if the opponent has taunts/board clears/healing/armor to win. Miracle should be about explosive turns into finishers, so here's what I've got. The goal is to seance a galvanizer to get 3 ticks on mecha'thun. Exhaust the deck on turns 6-8 with Auctioneers and perhaps some early Cleric plays and drop your endgame mechs. Finish the game with Thun into Shadow Word and win! I ended up removing mass hysteria and mass dispel as well as novice engineers in order to add the galvanizers and give more 1 mana spells so you don't end up with clunky cards at the end of the game before mecha'thun. Enjoy!

I might be tempted to try another version soon that uses Auchenal Phantasm/ 2x circle of healing/regenerate combo to finish. Only worry is those 0 cost spells are essential to cycle with Auctioneer, hard to hold onto the whole game. Let me know if anyone has thoughts.