Need help making a competitive Darkrai deck.

[unstoppable yoshi]

I recently got back into the TCG (haven't played since Neo Genesis). I've been looking around and I've seen several of the top tier decks in today's metagame. Here's a rough list of the deck I was thinking about making.

POKEMON 17

3 Darkrai G (RR)
2 Darkrai (MD)
2 Darkrai LvX (GE)
1 Unown G (GE)
1 Dialga G (PL)
1 Dialga G LvX (PL)
2 Crobat G (PL)
1 Skuntank G (PL)
1 Toxicroak G (PL)
1 Bronzong G (PL)
2 Uxie (LA)

TRAINERS 30

3 Roseanne’s Research
2 Bebe’s Search
4 Cyrus’ Conspiracy
2 Flint’s Willpower
2 Volkners Philosophy
2 Aaron's Collection
3 SP Radar
3 Power Spray
3 Poke Turn
4 Energy Gain
2 Galactic HQ


ENERGY 13

4 SP Energy
6 Basic Dark
3 Basic Psychic

Strategy: Take advantage of Darkrai G's effect by putting the Defending Pokemon to sleep. The Dialga G is to stop Mewtwo LvX, Toxitank and Unown G to stop Machamp, and Crobat G is to put counters on Defending Pokemon so Darkrai G's attack will put them to sleep.

I was thinking about adding more stadium cards like Galactic HQ so I could readily use Skuntank's power, but I was worried about Flygon and his ability to wipe out Stadium cards and become untouchable. I was also thinking about putting Level Max in here but no room =(