Looking at the original post it seems like you're trying to do everything with just one rainbow, you'll have to specialize if you want to speed it up. The idea is to hit the fg at least once with a Dune Scorp, and let them finish themselves afterwards (right?), so Quintessence, Forest Spirit and Lava Golem are just slowing you down.
Next I see novas, novas give you as much quanta as Quantum Pillars do in 4 turns, so Quantum are probably a better choice, as these novas are actually slowing you down, because you could've drawn much better cards.
Next up: Hourglasses, if you have a deck with 40-50 cards, 4/5 of them is a good amount, and make sure they are upped! With large decks you want to draw as much as possible, as fast as possible.
Sundials, they are great stallers, but work best in synergy with hourglasses, maybe go for the full 6?
Shields: you seem to have only dimensional shields, I could imagine that you easily run out of Aether quanta to keep chaining them, so you might want to add some other usefull shields, like the beloved Permafrost shield.
I hope my advice is of use, and remember that you shouldn't want everything with just one rainbow, or you are bound to have a slow one, also, creatrue control is not always necessary, even if thye have an entire field full of creatrues, as long as you hold out, you really don't care. Last but not least I would suggest SoGs, they can make a great difference in such a deck.