Here is a deck for my home boy Crowler. He actually turned into a pretty cool dude over the course of GX ngl. Anyway, this is a going second OTK styled deck around Ancient Gears. This deck is mainly centered around summoning out the fusions as fast as possible, the main one being Megaton golem, as it's the most generic and accesible of the fusions. I also included a small Cyber Dragon package with Chimeratech, to remove bodies from the board and get a beater on the field. Limiter Removal is also there to make OTKs way easier, but it is unsearchable sadly. Additionally, this deck is pretty consisent due to the huge amount of searching S/T and on summon searching monsters, but if going first you could potentially brick on Anchient Gear Golem and/or Cyber Dragon so be wary of that. Cyber Dragon can be sided out for Dark Hole, as Dark Hole triggers your own monster effs.
Fun fact: The reason Heavy Storm is still banned is because it would make Ancient Gears tier 0 : )