Now that there has been a nerf meaning that the combo doesn’t work with the old spell this method works just as well, and I’n my opinion even better, on turn 8 you play Drakkari Enchanter and Emperor Thaurissan when you have both mecha’thun and cataclysm in hand. This reduces the cost by 2 meaning mecha’ thun equals 8 and cataclysm = 2, this is the best I could think off.