Evil Hero Dark Gaia

I have been using a Dark Gaia deck recently, and I kinda wnat ideas on how to improve the deck. Currently it is a 41 card deck, and is fairly consistant at getting out Dark gaia. I'm wondering if it is worth rebuilding into a Demise/Darkgaia deck.

Monsters (22):
Rock types (:
1 x Fossil Dyna Pachycephalo
2 x Gaia Plate the Earth Giant
2 x Koa'ki meiru Sandmand
1 x Morphing jar
1 x Neospacian Grand mole
1x Valkyrion the Magna Warrior

Fiend types (10):
1 x Caius the Shadow Monarch
1 x Darkness Neosphere
2 x Evil Hero Infernal Gainer
1 x Gorz the Emissary of Darkness
1 x Steelswarm Cell
1 x Steelswarm Gate Keeper
1 x Steelswarm Girastag
1 x Steelswarm Moth
1 x Raviel Lord of Phantasms

Misc (3):
1x Effect Veiler
1x king Tiger Wanghu
1x Metaion the Timelord


Magic cards (15):
1 x Card Destruction
1 x Creature Swap
1 x Darkhole
2 x Dark Fusion
3 x Dark Calling
1 x Foolish Burial
1 x Heavy Storm
1 x Lightning Vortex
1 x Megamorph
1 x Monster Reborn
1 x Mystical Space typhoon
1 x Sword of revealing light

Trap cards (5):
1 x Call of the Haunted
1 x Mirror Force
1 x Return for m Different Dimension
1 x Rock Bombardment
1 x Royal Decree

Extra deck (3):

3x Evil Hero Dark Gaia