Back in the 1.24's I played total of 400 games with Hope-RoL getting ~50% wins.
Now repeat those 400 games with my version and say it again. You probably didn't notice but this version has NO SoG in the deck, so the chance to win against Morte, scorpio, and many others is significantly lower. This version probably gets around 40% at most if you play every god including the ones that should be skipped.
I know that Rol/Hope can beat every god except octane with a different deck build, but that's not the point of farming false gods. If you want the best possible electrum/hour, you MUST skip the gods listed. There is no reason to play against gods that give you a less than 50% win rate if you are going for the electrum, and this is especially true if that'd mean adding more cards to the deck that further slows it down (Shard of Gratitude) to actually get that near 50% win rate.
Yes, Rainbow decks get a much higher win rate, and a much lower electrum/hour because
-They are slower. Much slower. Especially time rainbows that have the best win rates. The time it takes to finish a game using those decks is twice (30-40 card speed rainbows) to four-six times (40-60 card time rainbows).
-Unlike Rol/Hope where a low amount of strategy is needed, with those decks, you need to pay much more attention, which results in slower play, and getting tired faster. It also increases the chance of making mistakes.
-When playing a rainbow deck, you don't know in advance which games you'll win or lose. You have to play all games (except the ones against divine glory and dark matter, those are usually impossible with a rainbow deck, not counting extreme luck, like the god not drawing towers for 15 straight turns). In case of this deck, you can give up/skip most of the losing games before playing them (or at worst case, on turn 2-3).
While playing with a rainbow deck, you spend about 40% of your time playing games you end up losing. When playing Rol/Hope, you spend about 10% on such games, and another 5-10% on skipping on the first 1-3 turns, so less time is lost. If you add this together with the deck speed difference, the end result is winning about 3 times as many games during the same amount of time as when playing a rainbow.
What I wanted to say originally : Replacing half of the towers with pendulums (which was also mentioned by someone above), is recommended. It makes Seism much easier, and it also helps against Dream Catcher, which is already 2 out of the 12 gods you can play.