Radiant skin sunsinger has the highest potential to consistently generate 7 orbs, as the longest roaming super and since weapon kills count towards orb generation. Great for PvE. Just equip a raze lighter/dark drinker and go nuts. The extra armor allows you to survive things that would otherwise kill you. Run sunbreakers and max discipline for additional DPS/crowd control. Most sunsingers just run self res and sit on their supers the entire game. Useless. If you need that insurance, even in strikes, then chances are you're being carried by your team anyway. Of course it has its uses, but in most cases you're detrimental to the rest of the group.