Good question. From what I've seen, most dps I've seen on my duo runs (both on my hero and villain) are the pet powers, earth being the most common, followed close by sorcery. I thought that the 1234 powers (specially Ice and mental) would take the lead, but so far, I see mostly these powers. And the most rare, would be nature, electricity, fire, celestial, and strangely I don't see many gadgets dps (I dunno why, gadgets is considered one of the strongest).
For pve dps rite now it's munitions.... Ice , earth.. Least fotm as a dps in pve nature electric light in that order. It's really funny how the better pvp powers are the crappier pve as a dps. Probably pvp fotm light celestial.atomic fire. Fire and atomic you can't kill. Celestial most dmg overall light most single target. I'm light and I only dps in alerts and I still hate it. Channeled powers too slow. The best overall power between pvp and pve is sorcery because it's great both ways not lopsided like most!