Ah yes .. the never ending saga of not having enough live rock. Salt One I am in same boat as you. I only have about 40 pounds so far in my 55 tank, but WANT MORE !!! I have decided that my tank is a "work in progress" and I will add more LR when I can. As far as the "right way" to stack it .. I feel that it's a personal choice. If you plan to have corals someday, you may want to create a "reef looking stack" with level areas for coral placement, realizing that some corals will need to be placed higher up to the light, and others may require a lower location. If FOWLR then just let your imagination run wild. It's cool to create cubby holes, shelves, bridges and areas for your fish to swim in and out of, not to mention enough places for everyone to bed down at night.
Just try some different ways, I really don't think there is a right or wrong way to do it. Remember .. this is YOUR tank.
Have fun !
Broomer