Ok, I'll first go over your list and then talk a bit about Zoroak in general.
Rayquaza – The Hateful Eight
The first thing that most players will notice is that the pairing in itself seems really weird.
M-Rayquaza EX used to be quite the strong archetype, working as a sort of aggro-combo deck that could set up blazingly fast and start the prize trade on turn 1.
Over the course of time there have been various iterations of the deck, some that focused more on consistent mid-/late game, other that incorporate a protective shell to fight M-Manectric EX and added secondary attackers.
Side Note: I encountered my favorite version of this deck at a small tournament in Tokyo, if you dig deep in the 60card archives you'll eventually find my article there.
Rayquaza faded away roughly around the Break area, as more and more non EX attackers emerged, offsetting the prize trade discrepancy and sometimes being able to attack on turn 1 as well (i.e. Vespiqueen + FogP). Additionally more and more useful stadiums for various archetypes where printed, alongside good options to deal with existing stadiums, thus Sky Field became a target more often.
The last nail in the coffin was arguably the printing of Zoroak GX. Essential you get a card with a similar attack that has an insane ability, is easier to set up in a single turn (no spirit link, DCE instead of DCE + Mega Turbo) and takes away far less space to achieve the same results.
The only reason to play Rayquaza in the current meta is the speed is to snipe decks like Buzzwole and that's about it.
You can thus imagine my surprise after seeing your list, as you essentially paired 2 Pokemon that share a similar attack, yet work in entirely different shells. We could maybe argue about including a 2-2 line as additional draw support and I'm sure we could draft a decent list around this concept, but in reality I'd always advise you to just drop Rayquaza and look for a better partner. This becomes quite apparent when you look at your set-up: You have no reliable way to bench 2-3 Zorua on Turn 1, as the archetype you are playing is designed to chain EX Pokemon and to OHKO everything in your wake from turn 1 onwards. There is simply no room for a Brigette or other tools that are usually used to enable a smooth turn 2 Zoroark turn.
For reference I'll post an older Rayquaza list in the end, in order to showcase how I'd play the archetype (because when you play this deck you either commit entirely, or you don't play it at all).
As I said before: I'd advise you not to play Rayquaza, as there are better options out there, but thanks to the diverse meta in Expanded at the moment the deck can still win games and isn't crushed without a shred of hope against the competition.
Zoroak GX – the bane of the format
Zoroak GX is silly. It was so silly that even after the recent ban wave that hit the archetype quite good it is still the most dominant Pokemon in Expanded without a close competitor in sight. However, the role of Zoroak has shifted over the course of his life.
Zoroak GX provides an ability that could be considered game breaking, especially if paired with a decent attack and a lot of HP. You can see a 2-2 line of Zoroak GX in Night March for quite some time now, you can see it paired with Macargo, with Golisopod GX, with Toad, heck essentially you can throw it into almost every deck. Not conditional card draw is insane in this game.
As you noticed earlier, the supporter is one of the most important tools in your turn and being able to focus on utility supporter, because your card draw is dealt with by Zoroak, can give you a significant edge over the opponent.
However, knowing which supporter card is the right one to play and how to use them can be a bit tricky at the beginning, thus a deck like Seismitoad + Zoroak is probably not the best one to start on, as it requires you to know a lot about the format and the game. Think of an archetype like Burn in MtG Legacy: Sure, there are nuances to the deck, but even if you are fairly new to the game you'll probably be able to play a decent round with it. No take a deck like DDFT and let the same beginner pilot it, the results will be quite different.
That isn't to say that you should settle on an easy to use deck, its just that experience can only be learned over time. I play this game on quite the high level and I can honestly say that I couldn't play this list without making errors, simply because a couple of card choices (i.e. Articuno and Girafarig) are not in my comfort one. I understand the reason why they are there, but I don't have enough experience with them to comfortably use them without making mistakes.
That's another thing that you'll probably already know from MtG: an online decklist is a fantastic tool to get you an idea of the general skeleton of each archetype, however every player has their own little tech cards that they tested extensively, yet they might come across as weird to someone who hasn't spend the same amount of time with the list.
See what works best for oyu and don't be afraid to cut something, after all even if the deck won an event that doesn't mean anything for your own play style, or for the meta you face online.
From what I can gather you are currently at a phase where you look for a lot of input and that's great, I'd only advise you to take it step by step. A deep insight into an archetype might be interesting, but based on your deck I'd say that you still got some things to learn in terms of basic deck building, as there are couple of odd choices in the trainer and supporter department.
One last thing in regards to Alolan Ninetales and similar cards: Try to ignore them for the most part (in the Rayquaza archetype). Those decks are not strong in the current meta, yet they bank on the hope of catching you off guard. Rather than trying to prepare for them I'd focus on the important match-ups. No reason to water down your deck in order to beat a thread that you shouldn't face on a daily basis.
Last but not least here are a couple of Rayquaza and Zoroak builds that could help you get some ideas (mind you that a lot of them are bit older, as I tend not to update my old decks).
a version of the deck that cut Mega Turbo entirely and focus stronger on the mid game, rather than the explosive start
Old school Turbo Rayquaza
The original deck, before cards like Hoopa or Dragonite were printed
Zoroak GX + Lycanrock GX
The banned cards need to be replaced, otherwise quite the fun archetype
Traditional Zoroak GX
Once again with banned cards ( I need to update my decks ^^)
The shadows of the abyss are like the petals of a monstrous flower that shall blossom within the skull and expand the mind beyond what any man can bear, but whether it decays under the earth or above on green fields, or out to sea or in the very air, all shall come to revelation, and to revel, in the knowledge of the strangling fruit - and the hand of the sinner shall rejoice, for there is no sin in shadow or in light that the seeds of the dead cannot forgive...