Continually tuning. This version uses both Twin and Spright cards to make both Twin and Spright cards. You're a super heavy Combo Control deck with the goal of breaking boards going second.
There are a few things I like about the Twins. While sequencing them first is less than ideal, I think they provide more options and power than the Nimble or Deep Sea engines. You also have a bevy of extra 1 card starters in the deck. The twin package is also really good in a grindgame, and very helpful going second to break boards. I like that the deck can main 2 Ultimate Slayer profitably, and that the Evil Twins is actually a good card in the deck. I actually think the deck is just slightly more consistent than the regular Spright builds, but I don't think it is actually more powerful in a relevant way, and you will lose pretty hard to DRNM if you don't see Imperm or the like.
So, into the card by card.
I'm on a bevy of board breakers in the main deck. We're trying to let people combo off and then just eat them. 3 Imperm and 3 Droplets are a good start to this, with Imperm being a sort of power card even when not used as a forbidden card, and Droplet being just insane at SS4, and having lots of extra utility in Evil Twin decks. To really round out this package, I'm on 1 ofs of Enemy Controller and Chalice. We really want to just push through negates.
2 Raigeki and 1 Lightning Storm are also main. Lightning Storm is a hedge against backrow decks, and Raigeki is just really good in a world of mirrors and Tears. Not being a HOPT makes the second Raigeki well worth running. I'm also on 2 Ultimate Slayer, which is pushed against Fusions and Links, and has a ton of utility in general. It can even send Toad for some value if you need to hit Xyz (Cat Shark might be a better send in those cases). I only want to run 2, because it is a HOPT and isn't as synergystic as Droplet, nor any good going first.
To round out the backrow hate I'm on 1 Cosmic Cyclone and 1 of the searchable Spright Smashers.
I like being on relatively smallish engines for both packages, so that you don't brick out on multiples too often but nearly always have play. The Frog engine is also as small as possible, I think in this version Dupe is a trap. It is okay, but not really nessessary - you grind fine and have actual ways to put up ATK points.
My extra deck hasn't changed much, but I'm on Cat Shark now to really push Gigantic over the edge. Djinn Buster comes up when you make Trouble Sunny, and also gives the deck an extra way to stop Nibiru and other hand traps when going first, but if you wanted to run something else that would be the cut. I'm on Omega for Slayer over Wind Pegasus, because I've found sending Omega to be really good in Dogmatika, and it is reasonable here, though the Wind Peg is missed.\
Still tuning. Made room for Ash.