I'm a level 14 FS and somewhat new player. Currently, I have a Sup Devotion V shield. I understand that potency and devotion don't stack. Do most FS and Clerics switch to potency items or do they switch out as needed? I've had trouble finding decent potency items.

One final question - does potency effect BB?

Between devotion, potency, spell pen - what other items do i need to be on the look out for as I approach 20? What is the priority?