If you like it but the scanlines are too strong you can reduce them with the Fake Scanline Opacity this preset is set up to help with the double sized character sprites and if there was increased internal resolution in use.
But it sounds like cropping in the standard presets is helping the scanlines have more pixels to work with and reducing the moire artifacts you are seeing.
I integer scale helps give an equal number of pixels per Scanline which can help with moire artifacts. So if you aren’t having artifacts then you don’t need it. It will also cause the screen size to change depending on the resolution of the game. Usually 1(ShortAxis) is usually what you want because this does its improvement for the scanlines, but keeps your aspect ratio correct, E.G. 4:3
This is usually just what is coming from the game and the way to fix it is to crop the offending areas with the cropping parameters.
In the automatic crop black option you specify what you want as the maximum you want to be cropped, but only if the area is currently black in the game image. It does work, but I personally only apply it sometimes and particularly if the black areas appear and disappear like in the n64 for instance.