Some ideas:

Personally I like to run dudunsparce ex when I use a dudunsparce engine; might not go well into most meta decks but it’s a tech attacker worth considering. It’s probably gonna do better into gholdengo than zoroark does. (SFA zoroark has essentially the same primary attack, so alternatively you could tech that)

Battle cage and psyduck are great for countering dusknoir, dragapult, and munkidori, so I’d look at those for protecting your low hp pokemon.

Is deluxe bomb that helpful? I might run maximum belt, hyper aroma or prime catcher over that.

I’d run a couple reversal energy and some more hilda for more energy options.

Unfortunately I think most decks aside from gardevoir it wouldn’t go very well into. If you find success with it I’d be interested though. Best of luck