I second the complaint about his slow movement. He should be 4. Stalkers/skaths are 5, aren't they? He's useless in a horseback party. Also, his attack was 26 when I fought him, but 17 when he joined me.
New question, has anyone used his lightning run ability? I couldn't make it work. I had him lined up along a line of three units, and it told me it had to be cast on an empty tile, but when I did that it said 'spell must target an enemy'. Grrr.