/sarcasmWhat, Asmodeus CR 36? That's two rounds of combat from a moderately optimized mid-level party, and when I say "moderately optimized" I mean that even chimpanzees could do that, let alone human beings who actually comprehend what 'math' and 'balance' mean.
Well, I can't speak for mid-level, moderately optimized parties or anything, but if you throw a CR 36 against a party of level 20/tier 10 heroes, you're almost certainly looking at a 1-2 round fight, tops. Either he'll be dead within that first twelve seconds of mythic combat or they all will.
I mean, CR 30s have a rough average of about 775 hit points, right? Based on Nocticula and Cthulu and such . . . . At CR 36, you're probably not looking at much more than 1100 or so, which still places this "god" within single round for a buffed up melee type or wizard that can bypass any and all immunities or resistances.