I USED to be the same. Target the priest first always. But now its a whole new ball game. If there is a priest AND rumir in the party which is the case nowadays in most high end pvp. Its pretty dam tough to take out any decent priest first.
LvL Incarnation and buy tons of skill scrolls and normal rev scrolls.
Staff Mastery is set for some changes soon so you will probs need to reset that later on anyways.
You can still put points into Judgement tho if you pve with your priest. Mines lvl 7 for when I'm duo with my wiz. Does some nice dmg