If your account is extremely poor for perfect corruption mission chars and if you have at least one set of trap talismans, try this :
Put the trap set on a Pharaoh water spirit, just farm the Adrenaline Rush at Battlefield hard. Run low damage single hit chars. Sentinel allied soldiers can remove beneficials and will mostly target the Pharaoh water spirit (because he is a reviver & they have class advantage). Once they remove the trap, they'll get perfect corruption. With this way you can get 3 corruptions per round.