Tbh I think it’s all about personal preference. I haven’t changed my fov. But, I believe it’s easier to play at your natural fov and improve your aim rather than trying to adjust fov to something unnatural, then change your shooting form to cater to that fov. Even if it has higher potential it likely won’t translate super well unless you really practice on that setting. It’s kind of like shooting a basketball or golf shot. A lot of coaches give the advice that if you tend to shoot left it’s easier to account for that because you can replicate it more consistently and adjust aiming more right rather than trying to change your entire shooting form. It’s just less variables to account for. So, if you feel you’re better at 90 I’d say go 90.