Solution for those playing at home:
||Tap Scrubland for a B, respond to opponent's Vamp with our own, searching for Brain Freeze, Storm: 2||
||Resolve our Rhystic trigger and draw Brain Freeze||
||Use Mental Misstep to counter opponent Vamp for graveyard count (4), Storm: 3||
||Sac Tinder Wall for RR, cast Underworld Breach with 5 cards in graveyard, Storm: 4||
||Generate UU from Volcanic Island and either land, cast Brainfreeze, target ourself with all copies, milling 15 cards||
||Go through the Breach combo with lotus petal||
I agree with OutFoxd. This is the line I went for. You also notable have 2 free counters with forces. You may want to save the misstep for a third free spell to stop a silence or something. Storm on freeze will be at 3 already from both vamps and breach to mill 12. 3 extra cards in yard isn't really necessary especially if you end up using some counters for protecting your win.