How about Golboids?
Also gem finder is not worth it. It will do 1 damage, and generate 1 earth quanta.
What you can do is play 6 brimstone, and 6+ fire pendulums. It will allow you to play a brimstone first turn and use immolation on it.
I would run 6 brimstone, 6 lava destroyers, 4-5 elite graboids, 6 Immolations, a gavel, and 6-7 fire pendulums.
You will get tons of fire and earth quanta, and put the cards out faster and more often I believe.