Neoverse

As with the Helena guide posted on this site, the key is to hit an infinite loop.

This one is a bit trickier though, as Naya doesn't have a cardset that inherently lends itself to one.

Gear setup is as follows:
Scouter
Unknown Stone
A.I. Candy

The scouter is going to let us farm precision for big money. We're going to want it. I would not pick a heavy overheat deck, if the daily deck affords you either of the cards below, hooray for you. You do want to at least be on Transcended Universe level 1 so we can visit the big bad at the end.

The very first thing we check before we get into the first battle is run over to the skill page and make sure the Endless Challenge skill is in our tree. If it isn't there, time to restart. You should level it up first thing, it only costs 2 skill points.

Our white whale is the rare card "Save Energy". It will let us reduce the cost of a random card in our hand to 0 for the battle. It costs 1 mana, or 0 when evolved. As we precision our opponents to death, we're going to be jumping into the lab and removing all but 3 cards from our deck. An attack of our choosing that doesn't overheat, and the Save Energy. I happened to use Fight Money for that extra $$$ but it can even be a basic attack card. Our 3rd card will be the rare instant "Neutralize" which also wouldn't hurt to have evolved (same costs 1, 0 evolved). After deleting most of your deck, the rest of your money will go towards shop refreshes to hunt these card down. Even though they are of the "common" collection (meaning communal between all 3 agents) they are deemed rare, so missions you get that let you choose from rare instants will help target these cards as well.

Once you have whittled your deck down to those 3, you neutralize a target that may interfere with your plan (very few do), save energy, make your attack cost 0, and thanks to the endless challenge, keep playing the same attack over and over again until a lot of people are dead.

You have the freedom to add a couple cards to the deck, as long as they consume or recycle (as you don't want any long term). Jab Jab's are good to help speed up the process, but don't get too creative.

This will get complicated on the final boss however, as her last two stages stealthx2. If you can save some Stealth Kits during your first 15 matches, those can help you mitigate the time she is invulnerable. And various skills can help speed up the process (Upgraded Force Blade will give you 1 force for each 3 attacks) and make those last turns less awkward.

Also, the last boss can be the one that gives you a Malware every 10 turns (it did on my run). Which makes a 1 turn kill improbable. Having mana items can help mitigate this, and the guy in the middle should be your primary target, so once he falls, the other 2 will drop that turn. By stage 3, you should have the combo in place where you weren't taking damage in the matches leading up to him so taking one or two on the chin won't be the end.

But yeah, plays are basically:
Neutralize a target
Save Energy
Attack with 0 cost attack
Neutralize a target
Attack with 0 cost attack
Attack with 0 cost attack
Attack with 0 cost attack
Attack with 0 cost attack
Attack with 0 cost attack
Attack with 0 cost attack
Attack with 0 cost attack
etc etc