One thing I have noticed most about these dots is that they help hold hate. We were fighting Dodore I was set for DD but was testing out this weapon. Normally I use Intimidation for tanking, but in this case I had out of sight. While this would normally be a problem even if I were to spam taunt and accomplice, I actually had no problems holding hate. I only needed to use taunt and accomplice to initially grab hate when the tank went down. (I know, I know, mages without echo drops)

So, to sum it up, these are great for hate. I think they would also be very effective on mobs that are weak to slashing damage.