My ideas:
Get rid of some otys, you don't need those many! (maybe 4?) <- Overlook this if you don't have quanta issues.
Add some vultures.
-Explanation: every time you eat an enemy creature, you get 1/1 for your oty, 1/1 per boneyard in play and 1/1 per vulture in play. Plus, as you said, they are emergency fodders.