Higher pressure usually makes tyres last longer, but camber adjustments can depend. WR setups have quite radical camber settings, so one side of the wheel gets all the abuse. Adjust it toward the 0 for longer life. You can check the F9 menu to see whether your tyres warm evenly.
As a rule of thumb, the inner and middle temps should be about the same and the outer temp lower (check after doing a few laps, of course )