Damage on a DP gets better as you go along and you find that a lot of your damage is AoE based. Bullet Rain, Empty Clips and even Piercing Rounds are all TAoE. It's all about catching as many people as possible, and yeah, Toxic Bullets are the ones I run with the most.
Big problem with DP/Kin I've found is that 1) You don't get the full effect of all the Kinetic part unless you're in close and you're squishy so sometimes it's dangerous to do such, and 2) People see Kinetic and assume that you're a buffer first and damage second despite being a Corrupter. I was told once my character was worthless without Speed Boost even though I'd rather been asked for it and infact have quite a few people complain about SB depending on map despite it's Recharge Boost. Really wish that ability didn't boost movement speed also.
Otherwise it can be a very fun set once you get Fulcrum Shift and Transference. Just expect to do a lot of Kinetics while in teams.
