Test every pressure yourself  (first pump to 40 psi then test if too bumpy then release 1 or 2 psi and then test again), you'll know when you find out the best tyre pressure (for your car).
For the grip in theory is lower psi better, but more risk of blowing the tire if pressure too low....
Im not using v12 but I pump my front tire cold pressure to 38psi, mine tire size is 205/55/R15
Wait a minute, after doing some internet browsing, I just realized that V12 evo2 don't has 215/55/R16 size.... I'm very sad now

Questions below not important anymore, because I don't have other choice

Hi all sifu2, today i went to a TOYO tyre shop looking for 215/55/R16 tyre, when I ask about Hankook V12 he told me this tyre very expensive so no one sell it... is it true?? Compare to Toyo T1R, CF2 and NE03.

Thank you