Conventional wisdom is to "Geek the mage first".  If we can get a surprise round in, I wouldn't object to hitting the Shaman with a javelin, arrow, and firebolt all at once.  The Drow should probably be priority target 2, but I think the front-liners need to start greasing unoccupied goblings after that opening volley to start bringing down their numbers.<br/><br/>I still think Silent Image to artificially bump up our numbers isn't a bad idea.<br/><br/>Basically, we want to hit hard and fast, decapitate the leadership and see if we can't force a route.  At least, that's how I see it.