I love this deck idea! I've tried a similar deck before with Absol G LV X/Flygon LV X (Same concept, different cards). However, when you get a bad start you just can't seem to recover....
I can't see much that could be improved with this deck, except I think that Chatot G is a lost cause. Perhaps try Chatot MD (Mimic) to help you keep you're hand refreshed in a power lock (Palkia Lock mainly)
Donez