Going back to this post from the PTR Feedback Forum
The live version of Shield Bearer is:
Shield Bearer: GR149 [Enforcer, Aughild, Stone Gaunts]
2.1 * 1.6 * 1.3 / ~1.15 = 3.80x or +8GRs
The 1.3 multiplier is Condemn % damage which wasn’t working on PTR v2, it is worth +2GRs since it is technically a separate multiplier. From a performance standpoint, this build is S-Tier. I can attest it also carries well in groups, just be sure to remove all Area Damage and don’t pull too large without a zbarb to keep you alive. It’s funny to see who lives after the lag.