One thing I see people make mistakes on with this particular list is where to play the Exp Share. You do *NOT* want to place the Exp Share on your Darkrai unless you absolutely have to. You want it on Sudowoodo or Tapu Lele GX. Neither are typically targets in a Darkrai list and neither is frequently active either. That makes it harder to lose energy when you lose a Darkrai. It also makes it far less likely that the Exp Share is the target of the Field Blower. When there is a powered up Darkrai sitting active with a choice band and you are staring at a 190 damage shot with the possibility of more assuming they can get energy next turn (which is a valid assumption BTW), taking out that choice band starts to look appealing.
I have also found that the list could use a few tweaks. One that I use is to drop 1 energy for an Oranguru. You don't need Sudowoodo most games and unlike Sudowoodo, Oranguru is surprisingly effective as a 1 prize attacker making it a perfect spot to slap an Exp Share. I also happen to be on the fence about using Choice Band over Fighting Fury Belt in this particular deck. 180 HP isn't a lot to hit in the current meta and even with the proliferation of Field Blower, you are still more likely to survive hits with FFB rather than Choice Band. It is also only the difference of 1 energy's worth of damage. I haven't currently altered any of my lists to use FFB, but I use it very heavily in my Koko GX / Raikou deck. Granted, even adding the choice band to that deck, it requires a Kukui to hit magic numbers on a Koko, but the underlying statement remains true. Survivability is significantly higher with FFB and the damage output isn't so much lower. Once Acerola drops, I think the choice will become obvious for basic pokemon...FFB.
Hope that helps.