How to balance:

First of all, raise the potency so that we are on pair with smn.
Then each time we cast verraise we get a debuff that last 60 seconds and can stack each time we cast again raise, resetting the duration aswell:
1 stack nothing happens (since smn can raise too)
2 stacks we get -% dps
3 stacks we get -% so that we reach the point we are now... In this way i think it is perfect imo.

The problem about raise is that a skill that you do not want to use... So you can not compare its utility with devotion/trick attack or whatever... And embolden is far weaker than the other buffs.