Sword Oath in T10-13 while tanking

[Reynhart]

Also, Sword Oath increases your AA damage by 50 Potency, as well as it doesn't carry the damage penalty that Shield Oath has.

Actually, Sword doesn't "increase" you auto-attack potency by 50.
It gives you a second hit at 50 potency.

The difference is that if one hit don't crit, the other still can. I suppose if one miss the other can still connect, but since I have enough accuracy for each content I've been into, I can't be sure of that.