This strikes me as needing Nykthos, Shrine to Nyx in some quantity to help with the devotion to green you're running.
Other than that, I guess it's worth a go.
For the SB, I would imagine you could go with a bit more removal and such. So I would probably go with something close to the following:
2x Pithing Needle
2x Cyclonic Rift
2x Fade into Antiquity
3x Essence Scatter
2x Izzet Staticaster
2x Bramblecrush
2x Primeval Bounty
This would give you a lot of added versatility:
Pithing Needle for problematic walkers and/or creatures (think Aetherling)
Cyclonic Rift if the opponent can flood the board or against devotion decks
Fade into Antiquity for problem enchantments and those pesky enemy gods
Essence Scatter for soooooo many opposing threats - nothing like countering a Gray Merchant
Izzet Staticaster flash defense that can deal with mana dorks, Elspeth tokens, and a bunch of other stuff
Bramblecrush for problematic enchantments, artifacts, walkers, even lands...
Primeval Bounty if you need some life gain or just have issues with stalling out, this will single-handedly beat mono-black devotion and will give you serious traction against control
I hope that helps...