6qq 6qq 6qq 6qq 6qq 6qq 6qq 6rn 6rn 6rn 6rn 6rn 6rn 6u3 6u3 6u3 6u3 6u3 6u3 6u7 6u7 77f 77f 7gp 7gp 7h2 7h2 7n3 7q5 7q5 7q5 80b 80d 80h 80h
I've seen that with steam machine my chances to win increase considerably. First of all, it has 15 life points instead of 1 of the lava destroyer. That means that in most of games I can summon it without quintesence with not to much risk.
Second, It's growing rate doubles lava destroyer's one. That gives me more chances to win those annoying games with miracles when I'm getting out of cards and I need more damage.
Third, fire needed for the steam machine is gived by the fireflyes. But even when they are not in play, I havn't been out of fire quantum.
Of course, I've replaced fractal with twin universe. Mostly I twin a heavy steam machine or an enemy creature that may help. I considere more versatile twin universe than fractal.
Finaly I added a phase shield. It simply gives you time before you can handle with permafrost or you can play it in the last 3 turns before you beat the opponent with the purpose of winning with elemental mastery.
I've tested this variation of the deck and I've improved my score.