Your picture sucks, but from what I can make out, it looks great.
I was working one similar to this and the first thing I started with was 6x Fate Egg. You can never have too much random in a fun deck. I would suggest 1 or 2 Nymph's Tears. I haven't finished mine yet.
(Don't take out of the Fate Eggs. Without them, it's just like every other Rainbow out there.)
edit: I see the picture now. Nevermind on the tears. You'd have to cut back on your water if you wanted to include it. Mine also uses Time mark for the eggs and has much, much less gravity.