It really just depends on your group, and a fair amount of luck. We've had attempts on Shade where we get elementals, blizzard, and flame wreath really close together (not so good) and attempts where they're all spaced out (really good)
We downed Shade last night after 2 or 3 attempts. Our general plan was to interrupt only the arcane missles, kill the elementals - start at the door and work clockwise, and we left the decision whether to deal with elementals or sheep first based on what his mana was as we approached 50% life.
You guys can get shade down, it just takes a little luck on your side.