Mwahahahaha!!!!! I will really enjoy springing my Scavenger now! I popped him on a Troll, effectively removing his Wait counter (the rules say you have to use the wait to attack the backstabbing would-be assassin), and the Wolf Totem leaped into his back. It was a great moment as a Dwarf player. Cheers.
As for the Shield Wall bit. I know it would be cheesy to have the Scavenger jump one of the models in the middle; I'm just trying to get the most out this sneaky cheeky model. Cheers again.