Yu-gi-oh Crystal beast deck - is this any good?

Question

Crystal Beast Deck

Monsters:

Crystal Beast ruby carbuncle x2

Crystal Beast sapphire pegasus

Crystal Beast amethyst cat x2

Crystal Beast emerald tortosie x3

Crystal Beast topaz tiger x3

Crystal Beast amber mammoth x2

Crystal Beast cobalt eagle x2

Grave squirmer

Rainbow Dragon

Destiny hero - defender

Spells:

Crystal Beacon

Crystal Blessing x2

Crystal Abunadance

Crystal Promise x2

Ancient city - Rainbow Ruins x2

Hand Destruction

Crystal Release

Crystal Tree

Traps:

Last Resort x2

Crystal Raigeki x2

Crystal Counter

Crystal Pair

Gift of the mystical elf

Negate Attack

Waboku

Trap hole

Botomless Trap Hole

If you think i should make changes then please let me know, thanks.

Answer 1

You might want to get rid of Destiny Hero Defender and Add another Sapphire Pegasus or Crystal Release because each standby phase of yours, your opponent draws one card while Defender is on the field. I've had that be my downfall in one duel.

Answer 2

Very very strong