Notes & Combos
Suuuuuper cool deck, Striker has lots of cool interactions with Live Twin since 99% of the time you are passing with Trouble Sunny in EMZ and 0 cards in the main monster zones, plus, Engage is free ash-bait!!!
Engage/W-Anchor are a cool and forceful way to make your opponent negate one of your cards, say he has a Baronne, you go:
Engage
doesn't negate?
add Widow-Anchor
Anchor targeting Baronne
there you go! :)
Jamming Waves is another form of forcing cards from your opponent, although it is a lot worse when compared to Widow-Anchor, mostly because it doesn't pop face-up spell/trap cards, if it did that it would be actually waaaaay cooler, since you could use it to pop any face-up floodgate, excluding IO, but it is what it is.. You could also replace waves with the second Widow-Anchor or any other 1-of Striker spell card, there are a lot of cool options too!!
As for the extra deck, the Zeus package is standard stuff, Cavalry's secondary effect definitely has potential to some niche uses
You can get into Kagari with Drones, and since you are generating so much advantage with this deck on it's own, it isn't that hard to find either Drones or activate Engage a 2nd time, so you could re-use Engage with it's +1 effect.
Zeke is there as a target to link-climb with Kagari!
The Live Twin part is basic too, just Live Twin doing what it does, which is drawing a lot of hand-traps and setting up Trouble Sunny!
That's it! Feel free to ask anything!!

What "staples" do you feel is absolutely necessary at 3? I'm low on UR token and I have everything at 2 (Maxx C/Ash/Ogre/Crossout/Droplets)

Maxx C is ,,okay at 2, I would consider crafting the third one as it's a timeless card, BUT with Floo running wild since it's release it isn't that impactful anymore
Like Maxx C, Ash is good all around, so you should consider it, and it has relevance in the Floow match-up, but there isn't a problem with running two
Ogre is insanely good right now because it counters most of the decks everyone is running, but in the long run you probably won't run 3, I don't know if you would even run it at all
Crossout is definitely one of the most powerful and important cards in the deck, you are so vulnerable to any interaction that you 100% need at least 2.
Droplet is fine at 2.
TL;DR: Ash and Maxx C are debatable, if you can run 3 you should. Crossout is a must tho! (for me at least)