You need to draw your minions (except void ripper and Mecha'thun) and one bloodbloom, then you can Hemet and you will be left with either no deck or just cataclysm and Mecha'thun to draw. The turn you draw Mecha'thun you can play both Galvanizer's, the deck may do well to swap the Void Ripper's for Twisting Nether's (needs some testing)
Here is my warlock version for standard:
You need to draw your minions (except void ripper and Mecha'thun) and one bloodbloom, then you can Hemet and you will be left with either no deck or just cataclysm and Mecha'thun to draw. The turn you draw Mecha'thun you can play both Galvanizer's, the deck may do well to swap the Void Ripper's for Twisting Nether's (needs some testing)