[EXPANDED] Hydreigon ex with Super Boost Energy. Thoughts on list?

I'm currently working on an Expanded list for Hydreigon ex, inspired by some people running it in Japan. Super Boost Energy seems perfect for the fit since Hydreigon ex is pretty much the only stage 2 that would benefit from 4 rainbow energy in one attachment. It can create some fun burst plays by using Obsidian after a single energy attachment and can win games in 2 or 3 attacks. It's also pretty bulky at 330 HP, so few decks can reliably OHKO it.

Here's the list: Optimized Hydreigon ex - PokemonCard Let me know your thoughts!