@ modzer
yes you want to use another ber in your tap viso for max DR and yes you want to switch out of shaft in your non tap setup
most typically use a viso for tap with ber + jewel and another viso for the NT setup because you dont need the extra ber with SS + Dungos
And yes you want to swap out shaft in your NT setup for another armor, i'd recommend prudence.
regarding the choice in viso you need to figure out which setup you like, some use high def ereps, some use high def DS visos, some use pally skill dia visos
imo the viso pictured is not worth using because one of the main advantages of a DS viso is the defense boost you can get as they can have up to 450 defense.
With yours only being 117 defense and not 400+ id use another option