but highlights need to be just below paper white and the skin tones at about zone 8-9.
Need a very contrasting look.
I may have missed what lighting you intend to use. But I would take a reading off the pale skin tone. "normal" zone isabout one stop more than the reading for "normal" skin tone: for pale skin, give one and a half to two stops more than the meter reading. Then overdevelop about 25% over normal development to raise the skin value. As others have said, Rodinal might not be the best for this.
In ye oldene dayz, some guys would do informal female portraits in 35mm in this manner: over expose tri-x a couple a stops, then soup in straight Microdol-X to give creamy white skin tones on portraits.