There is no need to separate those stats, the workflow is the following:
• Balance weapons for PvP.
• Adjust PvE content (enemies, their damage, their HP) accordingly.
There you go, you don’t need to be a genius to understand that increasing the damage dealt in PvE is similar to lowering the HP and Armor of those creatures. So since PvP exists, weapons must be balanced for PvP, and then, PvE content can be adjusted.