At the moment, Sword Oath has higher contribution the lower your weapon delay is, because it hits for the same amount no matter how long your attack takes. This should make all swords have the same Sword Oath % contribution.

Paladin DPS already seemed fine aside from that one massive oversight though. Just standardizing it to 25*weapon_delay potency would have been fine (a 2-second delay sword then has the base number, decreased below and increased above for the same DPS).