I am very skeptical about adding stone skins in a 30 card deck... Also it is not a real rush deck with so few attackers. I see the idea... You always have to give up the graboids for the pulvy.
What I would do up to t50: (ai5 is so quant heavy I don't bother with earthquakes)
About 14 pillars
6 golems
2 pulvy.
3 shriekers (You kind of have to without graboids)
3 earhquakes.
2 enchant artifact.
Upgraded, you can ditch 3 pillars and add 3 basilisk blood....
Of course you would want to hold on to the pulverizer. It is not typical for a rush deck and you can end up with bad draws. Now you have 6 golems, 3 shriekers, 1 pulvy = 10 damage dealers, which is about the minimum. If you don't worry about the pulvy being stolen add 2 basilisk blood... It can prevent 60 damage from a big attacker, which is better than stone skin. (Where do you get 50 quants to make it effective?)