I am not really serious about having RG as my main.
I do use +16 imperial spear and ring along with hero brooch and hero plate.
People already pointed out diminishing return as imperial boots also gives VP bonus.
So probably should just leave hero plate at +12?
either you sell your imperial spear & ring or you sell Hero Plate.
don't use them together.
your STR Abusive/Flatrery Armor would do better damage with that setup.. and not just VP.. all your attacks LOL.
if your gonna use it with Glorious Spear, Gelerdria or Poison forged spear, then keep it.. +14 if you like.