While this CAN most certainly come up, the formulae currently don't (can't) consider your example, because the TTL is ignored, it is set to equal the turns to wins. Because of this, both gods would be considered to have a 10 TTF, with a slight difference in spin chance.
So, yes while part of figuring out what to skip would ideally be based on TTL, it currently isn't, though TTF per god does mimic TTL. (If you have very long, drawn out wins, even if you can lose quickly, you need wins to make games against that god profitable). The final average TTF is simply the average of the (TTF per played god + 1 per skipped god).