My relentless pursuit to cure trailer sway - the dancing TT

Just like in real estate location location location.

With trailers it is tongue weight, tongue weight, tongue weight.

So far I do not see where you had done this.

We also need the axle weights on the TV.

Until then you may be wasting money and time when all that is required is get the tongue weight at or near 15%.

Running the TV with stock configuration and tires may also make big difference.
Not sure if yours was lifted but if it is get rid of the lift.