I would pick the best tire for the car, and say if a 295/35/18 fits, I'd change the rear end ratio to fine tune, rather then the other way around, having a spare ratio rear end is nice. Since this is the "handling section", and you run a TF, I'd lean towards a 2.94, being 3.23 is not enough change for the effort, and 3.08 is very rare. Also Pick your tire on future likely availability if this a driver, which seems always risky nowadays. I had to wait nearly a year to get my replacement 295's, although the supply seems to have improved in the last year or so. Tires are the most important handling decision one makes, and wider is always better.
On my DD,
Summit:
Bridgestone Potenza RE760 Sport Tires 102349
Bridgestone 102349 - Bridgestone Potenza RE760 Sport Tire
https://static.summitracing.com/global/images/prod/large/bdg-078345.jpg?rep=TrueNot AvailableTire, Potenza RE760 Sport, 295/35-18 Radial, 99 Load Range, W Speed Rated, Blackwall, Each
Bridgestone Potenza RE760 Sport Tire
Brand:Bridgestone
Manufacturer's Part Number:102349
Part Type:Tires
Product Line:Bridgestone Potenza RE760 Sport Tires
Summit Racing Part Number:BDG-102349
Wheel Diameter: 18 in.
Tire Size: 295/35-18
Sidewall Style: Blackwall
Tire Construction: Radial
Tire Diameter: 26.10 in.
Section Width: 11.85 in.
Minimum Recommended Wheel Width: 10.00 in.
Maximum Recommended Wheel Width: 12.00 in.
Directional: No
Speed Rating: W
Load Index: 99
Asymmetrical Tread Pattern: Yes
UTQG Tread Wear Rating: 340
Traction Rating: A
Tread Depth: 10/32 in.
DOT-Approved: Yes
Run-Flat Technology: No
Tube Required: No
Max Load Single (lbs): 1,709
Quantity: Sold individually.
Bridgestone Potenza RE 760 Sport tires let you drive in any car, on any road, with maximum driving pleasure. The moment you shift gears and turn the wheel, the RE 760 Sport tires go into action, giving you quick response and precision control. The RE 760 Sport tires feature inside offset twin ribs, a semi-slick shoulder design, a 3D center block, and wide straight grooves, so you'll appreciate their ability to hug, hold, turn, and stop on any road condition--wet or dry. You'll be comfortable and secure riding on Bridgestone tires.