You have already used 8 spell cards, 4 of which are none too useful to begin with. So I would say it isn't a rush deck. I don't see the shriekers you mentioned, and only 4 graboids. That is a waste of
quanta. Dragons are too expensive for a rush anyway.
This deck is stuck halfway. It isn't a good rush and it isn't a good control either. Even in a control, I would not use dragons. Would not use PA either. You have rewinds/quicksands and basilisk blood to choose from. All of which I consider superior.
I could see your point, if you had made a stall. Add dragons, shields, a few PA, maybe the pulvy. That way there is an actual use for it. Cost makes no difference, since here you will spam granite skins before you lay out the dragons. That is a fun build. Bit more difficult to play but it does work.