So - a lot of theory crafting about what works, but who has actually played against a 4BTL TLT Y-wing squad and won?
The last list I ran across had 2 PS4 Hired Guns and 2 PS2 Syndicate Thugs. He did not worry about stress too much, but ran far enough apart so he usually had at least 1 or 2 ships outside of Range 1 to use the TLT. K-Turn made him effective on turning and shooting the next round.
Assuming an experienced player is running this, it's that much harder to defend against and dice are fickle enough that they will fail when they are most needed.
With Worlds coming up Nov 4, I am interested to see how it comes out.
Will 4 Y-wings make Top 4 or 8? Will a Tie Swarm be in the mix? K-wings?
I've beaten Y-wings with the BTL-A4 title and TLT three times, twice against a pair of them with an ace and once against four of them. It's really not difficult, since they're at low PS and working with the Y-wing dial. (The mixed lists were much stronger, since they required mixed strategies to beat and could cover their weaknesses.) Hit them with a fore element that can take a pounding and/or something you're willing to sacrifice, and at the same time you hit them with a maneuverable flanking element.
In that game against 4Y my opponent lost one Y-wing before it could attack, then lost a second Y-wing to the flanking element on the next round, and then it was just mopping up. I did lose one of the ships in the fore element, but that was more or less by design, and it happened too late to affect the game.
TLT without the Y-wing title are tougher to beat for me, since you have fewer safe approaches and they tend to engage less predictably. But you can also afford to joust with them (especially if you can manage a fast approach), or you can stand off and blow them up from range with ordnance, or you can flank them (as long as you brought AT or Sensor Jammer or a Fel-style stack of tokens).