There's allready balancing issues so I vote a yes. :3
p/k wear plate would be amazing, but youd lose healing so =\ egh. tanky tank with heals yo.
So, then that leaves me with the obvious choices of p/k -
1. Holy sheild

yay more immunes!
2. and Sheild mastery because my p/k uses a sheild and the other good skills are elites <.<