Hi!

Take a versatile car (i.e. the Spear), fully upgraded.
Equip one or two rail guns and one or two fuel air missiles.
Stay out of the way of the big boss untill he exposes his core (after the red laser). Be sure you are ready and hit him standing from the main platform.
If possible, destroy the two smaller turrets first (but this is not required to win).

Good luck!

As the Dev stated, the Railguns work wonders. I used only two of them and got it down in two cycles of the core opening. I used a GTBlaze, which was a mistake because of the turn radius on the small carrier, but something like the Spear or Petite would work great if you can steer clear of getting hit.

Tumbler with 8 railgunz

use 2 fuel air missible and 1 railgun

use a car like the Spear as many others have stated and if you don't think your Spear is working out for you. Go old school from the Shockwave days and whip out the high armored cars what are also fast such as the Vice, Panini, Macari or the Gt blaze. And leroy jenkiens the Xform overlord and blast it with Railgun shots and end it with the fuel air rockets after when its done firing its giant red laser also one thing try to go slow if you try to do it old school with the faster cars you'll end up flying off the flying part of the Crusher if you go high speed in the said cars

I just beat the Final boss using the Spear two energy guns and one fuel air rocket launcher.

BTW isn't the time that we have to destroy the boss short? I'm mean 1 minute isn't enough!

i used fox with 2 energy cannons on the front and for the sides i used the fuel air missiles bc they kill xform bad boi in a split second

spam fuel air missiles once core gets open