and it's to make it easier on me to niff.
Well. The question is...
Do you find shield swapping to be extremely tedious? If so, a Valk Mant w/Deviling for you might be the right
choice at the cost of some defense.
If you a few more points of defense a +10 Mant may be good. But for the cost of that you might as well
get a Wolfheiden since that would be more effective.
Personally, in Niff I do this:
I have no necessity for using either one.
I walk slowly and hit my mobs, so that I don't lose them.
And I use muff because of the universality.
^ and I don't bother with a HO guard/buckler/etc.