generally machined aluminum wheels hold the tire better then the spun rims along with higher air pressure new tire design likes now. Since you are running tubeless, spinning the tube and ripping out the fill valve has been eliminated, you can experiment running without screws, just paint a witness line from the tire to the wheel rim and check for movement.
Ran cast wheels for years with just 5 screws per side w/ 1650# car running 7.0's also I prefer to run a 10" wheel for a 12" wide tire as it squares up on the burnout and evenly heats up the tire and contact patch on the track