Mage DPS; Why So Low?

I’m actually finding that I’m having the opposite problem y’all are. Recently I’ve been parsing grey while being middle of the pack damage wise in my groups. By that I mean if there is 10 dps I’m around 4 to 6 and if there are 14 I’m 5 to 8. I’ve chalked this up to me having only 1 piece of dom gear with the worst damage shard, but this low damage issue seems to be common to a lot of different mages. Are the high parsers just cheating the system? There are a lot of fights in SoD where you can exponentially increase your damage if you dont help with mechanics.