No expert, but I do come from a CSGO background. I play CSGO at 1280x960 4:3 stretched, and because I play stretched I never felt like any conversion outside of cm/360 worked for me. I'm global elite in CSGO and immortal in Valorant using cm/360 for hipfire conversion, and I use 0% monitor distance horizontal for scopes within the game itself. So 0.813 in CS and 0.747 in Valorant. I think the most important thing is personal preference, see what is comfortable for you and use that.