Touge tune for Altezza fully max, Sequential ST3

I'm working on a fully maxed out Altezza, sequential stage 3. In otsuki. Yall ever tried doing so? Cuz in my attempts i'm spending more time fighting the oversteer rather than actually touge-ing it. I'll hear comments on the build if, you got sub 5.50 using an altezza (any built) in death trial.

my build:

suspension stiffness:
F: 7830, R: 7885
suspension damping:
F: 255, R: 285

steering aggresion:
100%
steering ratio: 22:1

Tyre: semislick

Brake ST3, bias: 50%

WR, ECU, Injectors, Exhaust, Intake, Internals, Block: ST3

Aspiration: Sequential ST3