For the problem how much quanta a deck needs, read
this.
So to start off, it's pretty good to try and have a QI of 5. In your deck, the QI of
is 7.6, which is quite high.
An easy way to fix it is to remove a dragon and shrieker and replace them with a Pillar and Pendulum. This makes your QI go to 5.4, which is all right.
Next up, I'd suggest a few changes.
- 5 EQ's is slightly much, especially considering that you already have Pulvys, which can destroy later pillars as well. One early EQ is plenty to slow your opponent down enough for you to get the edge.
- Use Golems instead of Shriekers. Having only 5 Creatures in your deck is too few. In order to keep your QI low and still have enough creatures, you need cheaper creatures.
Now you have a QI of 5.8 for earth, which is a bit high, but still in the all right range.