Raid Build w/ ShadowfuryFollow

Hi all, my ICC10 group is currently on LK, but finds ourselves short of stuns for the Valks. I currently use the standard 0/13/58 build, but am thinking of spec'ing into Shadowfury for the stun. To get that extra point, I'm thinking of taking 1 point from Improved Soul Leech; does that make sense as the first drop, or should I look elsewhere?

And yes, I know that I'm slacking on the gems & enchants... this toon became an alt for a while, then got a pile of new gear at once & so I got behind on improving it

(The armory link isn't working in preview, try <http://www.wowarmory.com/character-sheet.xml?r=Mok%27Nathal&cn=Pechorin>)