I don't know if this will help, but here's one way I tackle the "hanging" part of the puzzle.
After my initial stringing up of the hammock (WBBB), I "eyeball" the angle of the suspension to approximate 30 degrees from horizontal and adjust Whoopie sling length and tree strap height if needed. My ridgeline is the "telltale" as to correct pitch as follows:
When the hammock is empty, the ridgeline is straight (more or less) to a bit droopy and has no real tension in it. When I sit in the middle of the hammock, the ridgeline tightens up and straightens out but is still able to be deflected (it's NOT tight). When I stretch out in the hammock, the ridgeline tightens up and is ideally a bit less than "guitar string" tight...varying to more deflectable with a hand twist if I have a bit more than 30 degree suspension angle.
"The more I carry the happier I am in camp; the less I carry the happier I am getting there" - Sgt. Rock