So I re-read the Pro System guide and I am not entirely clear if this methodology will save on keybinds? Or from what I am understanding it is more a methodology for organizing keymaps into virtual sets and then calling them for characters through the Do Macro system?

Is the above advice in Luxlune's reply based on the mouseover heal will save having to setup a single keybind for each character, hence saves a lot of keybinds.