In the rainbow, I will quit the novas(one quantum of each color is nothing for a card space), the purify(too situational) , quit the fallen elf, quit one or both mind flashers,quit one flying weapon, quit one steal and the unupgrades towers.
And I will add one or two flying queens for damage, mutations. Add two quintaessences and six sundials.Also add 2-4 time towers, until you have the hourglasses upped.
Try this changes and tell me if what do you think.