I highly recommend adding Triskelion to your deck. It gives you infinite damage with Mikaeus. Trike comes in with 3 counters the first time. Shoot one damage in any direction you like and two at the Triskelion itself, killing it. Then it comes back with four counters, three from itself plus one from undying. Shock something, shock Trike and repeat.

Mephidross Vampire plus Triskelion also means that your opponents don't get to keep creatures alive that die to damage.

I actually had Triskelion in here for the instant-win combo at first but can't bring myself to put it back in. It's not a strong utility creature and held the place of an "oops I win" card, which isn't what I've been trying to do. I've been thinking about keeping it in the sideboard but to be honest I simply have zero interest in the combo after playing it for so long.

Is Dark Confidant worth risking 6-drops?