I personally find the daggers fun, BUT, they do need a bit of a dmg buff and the proc needs to be checked. In elite rooks nest daggers proc'd and stunned up to 9 mobs, three times on same mob. I have not seen much for procs when tested in elite ren gol (maybe four times out of three maps)... Something isn't quite right with the daggers.....like the ideas behind the weap, it just needs a bit more dmg, and fix the proc so the higher lvl elites trigger the weap to proc.
...back to testing...