Forum:Help with Koa'Ki Meiru Deck

I am building a Koa'Ki Meiru deck but it's somewhat unstable.Please suggest which cards to add/change/remove.

Monsters:Koa'Ki Meiru Powerhand x3,Koa'Ki Meiru Drago<-->Guardian x3,Koa'Ki Meiru Valafar x3,Koa'Ki Meiru Speed x2,Koa'Ki Meiru FullBarrier x2,Koa'Ki Meiru Tornado x1

Spells:Iron Core of Koa'Ki Meirux3,Lightning Vortex x1,Magical Mallet x2,Pot of Avarice x1,Hand Destruction x2,Cup of Ace x3

Traps:Negate Attack x1,Magic Drain x2,Automatic Laser x3,Reckoned Power x3,Seven Tools of the Bandit x1,Mirror Force x1

There is only a total of 37 cards.Help is greatly appreciated.