I think it's safe to complain when hunter aoe dps is 400% higher than I, and melee facerolls to double what I'm putting out. When we get to a boss, I beat both of those on single and double-target dps by 10% give or take, due to better gear, losing to the middling-geared mage, which I can tolerate.
For anything larger than a pack of 6, multidot dps takes so long to ramp up. But MS itself just isn't getting the job done. SWP then MS doesn't help much in aggregate due to ramp up.
Ranged other than hunters are nerfed for AOE.
Maybe having a way to pre-load shadow orbs (I suppose I could pick up an inflatable training dummy or whatever that item was), and have shadow orbs affect MS damage.