Mainboard Changes:

-3 Zombie Infestation
-2 Squee, Goblin Nabob
-1 Forest
+1 Syphon Life
+1 Molten Vortex
+1 Flame Jab
+1 Raven's Crime
+2 Lingering Souls

Sideboard Changes:
-1 Darkblast
+1 Raven's Crime

This build is to see how well the deck works without Zombie Infestation, which tends to be an inferior card engine when compared with Molten Vortex.

Vortex is back up to a 4-of, and a single Flab Jab has been included as an inferior option.

Without Infestation, Squee is much less ideal card, and has been cut.

To fill the utility of blockers provided by infestation (and to a lesser extent, Squee), I am including 2 copies of Lingering Souls.

I am still testing the main-board Retreat to Kazandu; it performed well in the past, with the life-gain allowing me to hang on just long enough to get going with the rest of the deck, and if I see it game one against Burn it often ends the game.