AOE death from above, below and all around, lol. This build could provide really good dps support to a group in pvp. (It might be tough in solo play, but just because magblades in general are tough in solo right now).

My notes:

I think clever alchemist would be a good set. The build also makes me think of Grothdar...multiple AOEs from that and your other abilities would be rough on your enemies.

Your ultimates are both good. But my personal preference in pvp is to pick one, then use the other slot for soul harvest as an ultimate generator. You might not need it, but I usually find I only need one solid ultimate then can use the other slot for something other than Dps.

I'm not sure why sap essence is on both bars. Likewise, I think mist and cloak is redundant. I think there are better abilities you can bring in for these slots. Merciless resolve (even w/o the spectral bow) is a decent damage buff. Harness magic if you need wards...or even elemental blockade.

This is almost a bomber build. You'd ideally rush into a group and unleash heck. The drawback will be sustainability long enough to get your kills. My stamblade can spot a bomber and take them down in 2-3 well placed hits, so be prepared for that. Abilities that ward you or shield,you enough for just a second or two more of dps output will be helpful.