Wraithlord WIP 2

The camera on my new HTC Evo didn't like me last night.  Anyway, Did a fair bit of work on it last night.  They are impressive looking models, aren't they?  I have heard of Harlequin lists that run 3 Wraithlords, and I can imagine that's an intimidating list.

Thoughts.... should I put the heavy weapon (thinking scatter laser) mounted on left should or on left arm?  If I go arm, then small weapons will be shoulder mounted and sword arm will get a fin-thingy.