First of all i understand what you mean about Genesis Wave variants being hard to make your own, (trying that bundle of fun myself actually), but have you looked into the Tooth and Nail incarnation of nykthos green? I understand why Summoner's Pact is so amazing, but wouldn't Tooth and Nail be easier to cast? You would just need 9 mana to net Xenagos, God of Revels and say Worldspine Wurm ,(or any large trampler), and swing for the win. Also, you wouldn't have to rely on getting two of them. With your devotion/draw, getting a faster win would be much, much easier. It would also take some strain off the possibilities of counterspells, because you would have twice as many chances to get it right (assuming you don't just hit off a Mistcutter Hydra for 30+). Anyway, thats just my opinion, so do with it what you will.

Oh how I love green! It is just so fun! I've being play testing some variants of the gen-wave/devotion deck and now I found this... Goddammit I just putted the last one together and now I want to try this one!

Did you ever considered:

Sarkhan Vol = Haste enabler(and little pump) + act of treason is awesome!

Banefire = just another win condition;

Dosan the Falling Leaf = I used to run him on my gen wave deck, Its nice against control decks I'm not sure if it fits here because the biggest reason I used to run him is that if you gen wave in to one your opponent just can't respond at all;

Summoning Trap = One of the most beautiful cards for siding against control. Turn 2 remand? ok, SUMMONIG TRAP ON YOU!

I was kinda off away from magic for a while but now I'm play testing a my Surfing on the Waves deck recently seeing if Collected Company would have a spot... still testing though! again awesome deck +1 if you have any suggestions and have time to check out my deck I would appreciate!

PS: I was thinking on running a Panglacial Wurm just for the shits and giggles."So I'm fetching and now I cast this 9/5 trample from my library", seems fun XD.

Seems 1 temur sabertooth would be funny in this deck.

Nissa isn't modern legal.

There's no such thing as an illegal Nissa. I had a flashier version of this deck that was probably faster but far less resilient. My fatties of choice were Primalcrux and Khalni Hydra.

Stomp the Yard [Modern Green Devotion Combo]