Notes to Matt:

Exchange one of the Gisela's for another creature, potentially Flayer of the Hatebound. I forget exactly, but we spoke about another creature available to us.

Potentially Mikeus, the Unhallowed. His Intimidate ability could prove very useful, not to mention boosting your creatures and giving them Undying.

I would also suggest removing perhaps a single Vindicate for instant speed removal. I would personally run this with only a single Vindicate, and two instant speed removals, with the extra Vindicates in the sideboard.

Lastly, you could eventually max out your mana base by replacing most of the basics with dual manas. Godless Shrines, Sacred Foundrys, Clifftop Retreats, Dragonskull Summits, etc. You could then search for the lands I use in my Pyromancer Ascension deck to get exactly those mana cards whenever you need them. However, that's fine tuning. The deck works as it is for the most part.