Ok, I recorded 500 games with Instosis and these are the stats:
I'd say that my stats oscillated from 52% to 58% and averaged at about 55%-56% after 300 games... the final 54% is mostly due to the fact that I've not been very lucky with my picks (as you can see the most often picked ones are Seism, Chaos Lord and Jezebel, all with a ratio win below 50%).
Just for the record, assuming a perfect score vs Akebono and Osiris (which was realistically before the introduction of SoFo when Instosis was made) I would have had about 59% wins.
So for me in order of % I can divide them in:
EASY (>75%)
Lionheart
Neptune
Elidnis
Paradox
Miracle
Fire Queen
Destiny
Incarnate
Gemini -> Gemini is a bit slower version of Ferox in term of rashness
MEDIUM (75%-50%)
Graviton
Ferox -> I didn't find Ferox so easy as most people said, it always brought out a lot of creatures very fast and rushed me. A clogged hand can be fatal vs him.
Morte
Obliterator
Serket
Scorpio
HARD (50%-25%)
Seism -> Seism is probably the easiest of the "hard" gods, I played it by playing a time tower at a time, making it use a quicksand on it, then playing another one. I had a score above 50% until the last matches where I kept getting bad draws.
Chaos Lord
Akebono
Octane
Rainbow
Divine Glory
Jezebel
PROIBITIVE (<25%)
Decay
Hermes
Hecate
Osiris
Dark Matter
Dream Catcher -> It always played that damn Discord immediately
Eternal Phoenix -> I wonder how this one can be considered "medium", did they change something?
I will post some more considerations on them later, if you have some questions, feel free to ask.