OFA or t6 enchants for Shadow Fury

[ImNotPeso]

atm i have a sf enchanted normally (i.e. without OFA), u can see it here: https://sky.shiiyu.moe/stats/ImNotPeso/Grapes

I do about 100k on first hit, and then 70-105k afterwards. With my friend's ofa sf i do about 140k per hit.
My question is should I swap to OFA or invest in t6 enchants?

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