4. make a custom cable.
On a StarQuad I wired it as:
XLR RCA
Pin1 - Cable shield (And ran the shield out before the RCAs and tied it to the phono stage chassis ground.
Pin2 - RCA Center
Pin3 - RCA barrel
It would be interested in to know how your option 3 is done, and whether the option 2 and option 1 differ. I am a fan of Neutrik…
I think you could be better off with option 3 if your cable length is ideally just over a standard size.