Tire grip really matters the most'.'
Other traction improvements;
Tight suspension bushings...oem or upgraded works so long as they are tight.
Anti-lift kit
Stiffer engine and trans mounts
You likely experience wheel hop right? Power level is the determining factor on what all you need to do to eliminate the hop. Some find a dogbone insert is all that's needed to fix the hop. Others, the insert plus an ALK(anti lift kit) does it. Those with increased power may also need to go a step further and replace the Eng and Trans mounts. You simply need to chase the hop based on the power you have as well as the suspension stiffness. Some say just get the dogbone insert, but they leave out their the power theirs makes, spring rate or dampers, or ARB situation. It all has an effect.
All of that ↑ other than tires...are just necessary adjustment needed for use and driver preference.
If there's not a team working on those tweaks...then you are left with the old trial and error path.
As replacements are installed; under and over steer will change and adjustments are required if traction issues are taking place when cornering.
You can simply begin replacing bits and adjusting those which can be adjusted to see how much it helps or how much it affects under and over steering. Then you make the next move.
Read, read, and read some more on "improving traction" articles. Such as articles like this;
https://www.paradigmshiftracing.com/racing-basics/step-by-step-race-car-setup-guide#/
