What's your targets?
AI3/AI4/FG/Bronze/Silver/Gold/Plat/PVP2?
You have 3 upps, indicating for a target audience as a cheap Bronze/AI4 deck? Yet, it is indeed fat, which means you are relying heavily on the denial of the earthquake and blackholes to hold off long enough, but your quanta is almost all time... So right now I figure this does best against AI3/Bronze, You're talking about killing rainbows, so I'm guessing for Bronze.
For Bronze, you could speed up the denial and control a lot of different ways, rethink how much denial you really need and it's sources? You need because you could find a grabix deck much faster with almost the same amount of control,