The Gods and Ral all seem really bad here.
Keranos, God of Storms is just...bad, no matter what you compare him to. True, he can pull a land off the top of your deck...but Oracle of Mul Daya can do that, and so much more, for one mana less. If you can pull two lands off the top of your deck with an Oracle, combined with Sensei's Divining Top you can look at six cards off the top of your library in a single turn. Plus, Oracle even accelerates you, which Keranos does not. A single Bolt effect is not the worst thing ever, but if you were that worried about creatures, then just about any red spell that hits multiple targets would not only be better, but would almost always cost less. In the same slot, if I was worried about such things, I would rather run Volcanic Fallout, Pyroclasm, Bonfire of the Damned, Fire / Ice (which also pitches to Force of Will) or a whole host of others. The fact that the same Bolt effect can hit your opponent is also not relevant because right until the point where this deck wins, this deck couldn't care less about its opponent's life total. When we're swinging, we're not only taking out huge chunks of life, but we're taking out huge swaths of permanents. Even 100 life just doesn't matter if the opponent's board gets wiped every single turn.
Kruphix, God of Horizons is also bad. The no max hand size will rarely be relevant unless your draw is absolutely awful or do something absolutely absurd like have 30+ mana and Candelabra of Tawnos to bounce Kozilek, Butcher of Truth multiple times off Karakas. If you're doing that...just win the game already. The not losing mana is all right, but we need to be ramping up, not stowing mana away for a rainy day. I think about the best use of the mana storage ability would be to tap a Cloudpost in response to a Wasteland activation...which is really, really reaching.
Another test the Gods fail at is the Show and Tell test. When would you ever Show one of them in over a Titan or Eldrazi? The answer would be pretty much never. The other creatures in the deck scream "Answer me!" or else they pound your opponent into the ground. The Gods just sort of sit there, and may slowly grant you an incremental advantage. I would rather Show in pretty much any other creature the deck runs or has run - including Oracle and Trinket Mage - over one of those Gods: thus, the fact that you can Show in a God also isn't really relevant.
And yes, Rock is right: Ral Zarek is also still better than the Gods. Sure, you can't Show in Ral, but Ral does several things the Gods do not: he controls the board if you want him to, he can accelerate you, he protects himself, and his ult wins the game. And he's still bad. Karn Liberated, though higher up on the curve, does all of the things that matter better than Ral or Kiora, the Crashing Wave ever could.