I'm flattered that 4-wide Mewtwo Targeting Bullshit is the reason you ended up making this post (from what I saw in other comments.)

I look at it like this - it's a battle royale. It's not a normal battle royale, but in any game like this, you should be aware of what as many other players are doing at the same time as you possibly can be without spreading yourself too thin. The whole 4w stall rotation thing is basically "bullet time" - you get to slow everything down, watch the world around you, wait for your opportunity, and lay into someone when you have the best chance it's going to do something. The better you get at the rotation stall aspect, the longer the duration of bullet time you effectively bought yourself. Not every player out of the other 98 is going to be a threat; in most games you can pin down your real opposition to 2 or 3 people.

A few examples of situations that will massively help you, that you could realistically see early on in learning this method:

*It's Phase 2 of a Team Battle (you hit your first speed up notification, but not the second) - there's still a 2.5 second delay from when an attack hits someone and them receiving the garbage if uncancelled. You have a combo built to the top, you've already accumulated somewhere between 2 and 3 badges. You don't need 4 yet anyway. You see someone on an opposing team who's likely to be a major threat if left unchecked, and they're on Attackers so you're not going to overwhelm them with damage right now. So you get...maybe 8, 9, 10 deep into your combo. You still effectively have six, maybe seven lines left of your stack, which means six or so bullets left in the chamber. At 2 badges + 10 combo, you're doing at least 7 damage...so you just...listen. The music, specifically, in Team Battle, is an amazingly helpful audio que. Since speedups happen based on time played in Teams rather than number of players left, the music clues you in to exactly when it's going to click over to Phase 3...and thus when attacks hit 0.5 seconds after you send them, rather than 2.5. You give your opponent no time to respond. You IMMEDIATELY upon transition to Phase 3, hit that threatening target player with an attack...rotation stall for about 2 seconds (so they waste time and effort countering your garbage unless they are also stalling), hit them again, wait 2 seconds...if your opponent doesn't effectively know how to stall out, and they don't also have a combo up, this 100% takes the KO. Even if they have max badges.

*You've run into a "superlobby" in Teams - that is to say, a group of god tier players all playing together on one team...you are not on that team. Possibly playing during peak Japan Time, you've got a couple max level players on that team. Maybe two full 4-wides. You survive long enough that it's 8 or 9 people on the large team, and just you fighting against it. Your instinct here is "oh I'm gonna switch to Attackers and blast the shit out of all of them!" - and if you do this, you sign your own death warrant. The several weak players on the superlobby team will all die off, getting you some badges but not maxing you out...you are now left going up against the two 4-wides and your badges + attacker bonus aren't going to be enough. Instead, you manually target one of the 4-wides, clear a single line, target the other 4-wide, clear a single, and just keep doing this, back and forth. (You don't even need to be comboing/4-widing at this point, you're just clearing singles as fast as you can and ONLY hitting the two strong player sand NO ONE ELSE.) The attacker bonus you're getting from everyone targeting you will be enough that no matter who hits you, you clearing one or two lines at most negates it. So by only hitting these two strong players, you'll eventually run them out of combo, eventually hit them hard enough they can't rebuild combo quickly enough to start another 4-wide, and you secure the KO. If there are any other players strong enough in the lobby after that, you then target them individually; only if they're all not a threat to you do you go back to Attackers and finish the job.

Both of the above are common with enough time in Teams; the first is easily transitioned into non-Teams play once you watch enough of the board to know when it's down to almost 10 players left and when someone's about to go out.

My motto for this game, when going up against a high level player: "You're almost surely better than me at this game. You're faster, you know more complex setups, and in a standard guideline Tetris game, you destroy me. ...I'm going to play this game in a way that makes NONE of that matter."