I’m using a Radeon 6700XT, and right now I’m boosting desktop mode frames with LSFG. I recently found out about OptiScaler, but this game doesn’t support it, right?
I've never tried OptiScaler but according to what I see it works via replacing an existing upscaler in the games you use it with. As far as I know VaM doesn't have any upscaling features without mods so I don't think you could use it.