By itself Gravity can kill or stop non-momentum creatures with any level of health, on a renewable basis. Gravity Shield stops everything above 5, and momentum on an Elite Otyugh covers everything below 6. Plus an extremely stable dragon, momentum, one of the best CC spells in the game (Gravity Pull), Armagio as virtual healing, a killer anti-rainbow spell, and endgame burst damage in the form of Catapulting... I think people voting option 1 either don't like Gravity's playstyle or simply don't know what it's capable of in mono.