If got Crystal blessing in your hand yeah go for it.
but here some more tips.
when powering up CB power up Amber, it effect can cause damage to those that don't expect it.
also don't have continum cards like Call of the haunted. they use up a spell and trap zone and that my friend is not good.
time Rainbow dragon effect. if it before the damage stag it can prove beadly if they have Magic cynbler as it reflect your attack back at you. but if it during the damage stage then it mean you can cause a OTK. (better if you leave Rainbow dragon to attack last.)
Crystal abuance and Rainbow dragon combo is a easy OTK to use but hard to master unless you have to of the same CB and Eagle as if it 5 you can send one to the top of the deck and summon Rainbow dragon.
Though not a CB Neos and Rainbow Neos can be a great power help.
there more if you want them.
yeah I though I hope I not forcing you into using them.