You don't need the life-gaining stopping maindecked. Sulfuric Vortex can have 2 copis maindecked, the rest sideboarded. I'd run Chrome Mox and maybe 2-3 Shrapnel Blast, aside from a set of Great Furnace, and use the Chrome Mox to not only helping up ramping to a turn-two Magus of the Moon, but also a turn-one 2/2 Figure of Destiny, and run maindecked Slith Firewaker, also dropping on turn one. I'd probably also run Molten Rain maindecked, and the fourth Magus, and lose the Demigod idea completly (perhaps sideboarded, it's just too expensive), and probably run more efficient burn like Shard Volley/Flame Javelin. Browbeat might fit the sidebaord as well, although maindecked it'll clog up the 3-slot space, and I'd rather have Ram-Gang, Molten Rain and Magus on that slot. With a set of Chrome Mox, you could also cut down to 20 mountains. Oh, and I'd sideboard Genjus, tops, although maybe not even that. If #$&*@!'s Thunder isn't clogging the 3-drop slot, I'd switch it for Flame Javelin. If it is, for Shard Volley maybe, or Rift Bolt.