So it doesn't sit well with me that flurry's damage is considered a damage over time effect rather than successive hits. I mean thematically that speaks for itself, you're poking the enemy with your weapon 6 times and it's in the same boat as cleaving your enemy and leaving them to bleed or throwing a fireball at someone and leaving them to burn.
From a balance perspective, I think it would be great if duel wielders were able to rapidly throw out on hit effects like siphon, degradation, evil hunter, siphoning attacks, and any other on hit effects. Especially given that it's such a high risk ability in that the damage can break in so many different ways, it's a channel which leaves you open to shield bash and interrupting abilities and your mobility is shot while using it.
Also if it does prove to be OP allowing it to apply on hit effects, just shift the damage around to be in less hits over the same time - think from 100x 5 + 250 to 125x4 + 250 or even 150x3 + 300 All of these add up to identical total damage but with 6, 5 and 4 hits over the 1.3 second channel time respectively. This makes it incredibly easy to control it's power through on hit effects yet still being able to give more strength to the ability through said same effects.
Discuss!