please help

hey i would like to know if my deck is good and if not can you tell me how to fix it please the problem i think is that i cant get dark rainbow or rainbow to hand or field quicker please help

[You must be registered and logged in to see this image.]

Run 3 Sapphire and Topaz, 2 Mammoth and 2 Carbuncle, rest aren't needed.
Consider Summoner Monk for speed.
Most Crystal beasts run a Malefic engine these days instead of a Rainbow one, it's more effecient.
Run 3 Ancient City.
Take out the Equip and Continuous spell for Crystals.
Run 2 Rare Value


Here's a quick build I made in around 2-3 minutes, untested and probably terrible since I've never used the deck before. But it should give you a vague idea of what to work with: [You must be registered and logged in to see this image.]
Consider adding in some Dualities.
Run less tech and more staples in Traps.

Consider adding tuners (Which one is up to you) so you can go into cards like Scrap Dragon (Scrap Dragon has so much synergy with Crystals)