Seems pretty great! Maybe just a little slow though. Also, you have another combo available in the deck that you may not know about. You can beef up either devourer if he's out or ooze if he's out with devourer in the graveyard, if he's out, respond to the sacrifice trigger being put on the stack by exiling more cards and beefing him up more, then sac to Jarad for the kill. It's especially great in multiplayer, but still viable in 1v1.