Heres the Ra OTK deck w/ hieratic engine. Marik's Power of the Tributed is a must. But if you dont want to use Marik, you can replace Ra with Emperor or Legendary
Hieratic Seal of the Dragon King | Decks and Tips | YuGiOh! Duel Links - GameA
Hieratic Dragon of Nebthet (Duel Links) - Yugipedia - Yu-Gi-Oh! wiki
B.Z Sakura (@BZSakura111) / Twitter
Hieratic Dragon King of Atum (Duel Links) - Yugipedia - Yu-Gi-Oh! wiki