Seal of Command, higher levels

[jeckwild]

Respecced my pally again, for the sake of comparing Seal of Command vs. Seal of Righeousness

(Anyone has a link to some solid comparison of those 2? With and without judged Crusader, with slow and fast weapons? Pretty please!)

Now, Seal of Command has 5 ranks, that increase the holy damage when target is stunned.
I found this obscure and marginally useful.

So, does it make sense to cast higher level of Seal of Command? Does it proc more often? Or should I stick to Rank 1, since the bonus damage = weapon damage = doesn't scale...

Thanks!