So, after losing a bunch against Volcarona Expanded, I realized that deck HAAATES item lock. So I started playing N at more crucial junctures, adding Marnie as well for the same purpose: combo with item locking opponents into dead hands. It works!
Now, however, I think this deck needs a tech here and there for Mew VMAX, which I haven't quite figured out yet. Thoughts? Fan of Waves? Weakness Guard Energy? Comment some ideas.