@Tanure13's list seems the most like the original VespiPlume list, which was just so stupidly consistent and powerful, and has a lot of building blocks I'd use if I were to build the deck,. As a Volcanion player myself, that kind of build scares me the most, esp. with talk of swapping a Vaporeon line for Shiinotic. The deck's real true power comes from Item locking Turn 1, but so many of the lists I've seen are built around the Plume Box archetype, with a bunch of 4-of supporters, which was WAY clunkier and didn't get T1 lock even half the time.
My main Q is: why isn't Unown a staple in this deck anymore? I know, I know, without Vespi it doesn't seem like a necessary inclusion, but you're essentially playing with a 56 card deck and starting with it isn't as annoying because you're playing a minimum 3 Floats anyway.
Another card I've loved in my previous Plume builds and would try to find space for is Red Card. It's an insta-play card that, in most situations, shorts your opponent 2 cards. With most decks running around 50% items, the odds of Red Card-ing them into a pile of useless junk is pretty darn good.