said by Nick D: I guess its a question of using WoG over SotR, but SotR is still a good thing to use for damage reduction purposes.
I always try to keep 2-3 holy power in store in case I am expecting a big hit for SotR, If I am receiving consistent damage while aoe tanking, I will use WoG on every 2 charges or even stacking to 5 to have a buffer to use twice. Since I will get two charges right away when I CS/HoR and Judge.