2 rainbow dragon
3 saphire pegasus
2 amber mamoth
2 amethys cat
2 cobalt eagle
2 emerald tortoise
2 ruby carnbuncle
2 topaz tiger

2 crystal ambudance
2 crystal promise
1 crystal bleesing
2 crystal beacon
3 ancient city rainbow ruins

2 rainbow life
3 rainbow path
2 bottomless hole
2 crystal raigeki
2 crystal pair
1 mirror force
1 torrential tribute

needs fix

-1 rainbow dragon

thats all the help i can give lol xD 1 is enough i might be wrong but not sure

damba kun i think one of sacred beast that have to tribute spell is better then rainbow dragon also carbuncle is a good card too add more :0

for ur spell try some staple o.O

ALSO - all rainbow trap ._. thingy

-1 rainbow drag it really hard to summon but not inmpossibe
-1 ruins 2 enough u dont wan a dead draw
+1 hamon lord of striking thunder
+1 tree (it good if u can pull it off )
that all i took these from my old CB deck which has wo alot of dueles

why not add a hamon ?

tnx for suggestions mates

Sometime CB don't run with any traps, I would
only run torrential and crystal raigeki(s). Could depends tho.
+ 1 Amethyst cat
+ 1 Rescue cat
+ 1-2 Crystal Blessing

I don't run any traps in my CB because it makes the deck faster and more consistent. i personally don't use Rainbow Dragon so i would

-2 rainbow dragon +2 Dragon Queen of Tragic Endings
-2 Cobalt Eagle +1 Topaz Tiger
+2 summoner monk (awesome for xyz and pegasus)

+1 crystal beacon
+2 crystal tree
+1 monster reborn
+1 dark hole
+3 mst
+2 duality

-all traps (maybe 0-5)

Have you considered Xyz? They're really fast w/ CB and work great!
I hope this helps