Medium and high speed corners need less Ackerman then low speed corners plus you use less steering angle in medium and high speed corners. I all comes back to what you're planning to do with your car.
There's no one Ackerman, Caster, SAI, Camber, Toe, Ride Height, or other setting that works well everywhere. Build adjustability into the suspension and steering and then be very, very willing to use that adjustability.
On my old race car there were a lot of things that were not "ideal" per the books and the Internet message boards. But it was very adjustable and I kept fiddling with things and taking notes all the time.
Inside front tire temps too hot on a fast track?
Add 1/4" wider front wheel spacers and reduce caster by 2 degrees.
Lap times drop, tire temps even out, slightly loose.
Remove front wheel spacer.
Lap times increase, inside rear tires get hotter, loose.
Add 1/2" front wheel spacer.
Laps times increase more, front tires get hotter, rear tires cool down, push.