Edited new settings to the first post. Got DBLNTSC to work as well (sometimes OSSC won’t sync and rebooting OSSC fixes it). Also slightly adjusted other settings and added comments. Ditched lineX3 settings since my settings produced either incorrect aspect ratio (Linetriple mode 16:9) or were wrong (Linetriple mode 4:3).
Perhaps somebody could do lineX3 settings but I think those lineX2 settings are as perfect as it gets.