Personally, I feel like if builds are over-performing in the Crucible, the balance changes should be attempted to made in a way that only affects the crucible.
Hence why my post here: Pets and Crucible
But that was about pets, so it is easier to nerf the power of blessings/banners on pets and call it a day if their crucible performance needed to be nerfed.
I don’t know how hard it will be with non-pet builds but personally, looking into blessings and banners first before touching the masteries and items seems like a good idea to me. Unless ofcourse the same builds boast insane times in naked crucible runs and such.