I think you're overestimating it - It's roughly 750 potency per second, depending on how you calculate the DoT (250 upfront, 500 delayed in DoT). For single-target, that's nothing to write home about. For AoE, it's quite good, but only bots are gonna allow you to just keep it up. If you don't have a healer backing you up, people can just gib you through it and even if you do, there's still CC - It's probably gonna be broken by stuns, sleeps, draw-ins and knockbacks.
The skill will probably shine bright in Rival Wings to take down the Mammets, but I'm not seeing much use in actual player combat. I mean, with the frontline bots, it'll be good as well, since those also ignore you, but, uh... yeah.
