I was thinking Rashak would follow Hazrael 50' behind. I peeked at his character sheet, and he's 5 points better than Rashak in both hide and move silently, so having him lead by that distance will hopefully counteract Rashak's relative stumbling. Rashak's move speed is 50, so he can close the distance really quick. By the same logic, the spellcasters would follow some distance behind Rashak, using the distance for protection. So Hazrael would retreat and fire arrows as Rashak charges forward. Its the standard scouting rogue, backup fighter scenario, with Hazrael being a lot tougher than the standard rogue.
Or if Jyren (and presumabley Merion) want to be in the middle, that would mean Rashak brings up the rear. He'll be right behind the spellcasters, as he's stealthier than they are anyway, and he'll best be able to protect them.
Or if Hazrael feels safer with Rashak next to him, or just behind him, he'll do that also.
What do the others think.