After last night Im sold its simply the only wait to go.

Setting a focus isn't so great for the nuke, but its priceless for them not knowing who your real target is.

You know those pesky melee characters that run in and just MS the hell out of you but you can't cut through their HPs because they are getting spam healed. I know set them as the focus, target someone else, purge 1 volley of LBs and then proceed to damage them using my focus damage spells. They dont even get healed once, I can only imagine what their vent sounds like...lol "He's targetting me heal" and then "WTF Heal me im taking DMG, DOH Im dead"

Teams cant respond to normal damage when they cant predict where its going. Take it for what it is, but my opinion is the real potential is in the effortless change in targets without them ever knowing.