i think it would be cool if they would make a smite spec more viable in PvE yea it can do decent dmg but it doesnt bring the synergy like shadow priests cause of the mana back and the extra spell and shadow dmg
First you need the addon recount (files.wowace.com), then go config, then the window bar and click DPS on the right side (under Global Realtime Windows, Raid). You should now have the DPS graph showing.