Regional Deck Choice

OlderAngel11

So, I'm going to a regionals soon, and I need to decide which deck to play. From my testing, Charizard ex looks to be the strongest. But there are a bunch of options.

Charizard ex

Gardevoir ex

Mirage Gate Toolbox (with Kyogre)

Lost Zone/Giratina

Colorless Lugia

Rapid Strike Inteleon

Arcues/Aerodactyl

Miraidon ex

Those are the best options. Some of these I haven't actually completed yet, like Colorless Lugia and Miraidon ex, but I can probably build them before going to regionals, or at least borrow the cards from some friends. But what is your guys' opinion? Tell me if you think I missed a good deck that should be up here, and tell me which deck you think I should play.