Someone Else's Problem is the answer to so many struggles that decks with location jobs run into. Nothing like having a significant part of your deck shut down because there is a dude with a Legendary Holster that can kill anyone you bring along. Thanks to Someone Else's Problem, you can keep him out of your shootout. He can't join the posse and he can't be affected by the job. That means Kung Fu dudes can't show up later and you can exclude a player's obvious choice for Election Day Slaughter if you want to.
Essence of Armitage is another Mystical item to fuel Ambrose Douglas along with the abomination theme. It can only attach to abominations and gives all dudes that aren't abominations -1 bullets in a shootout. It also has the chance to earn a control point whenever a dude flees the shootout. Since it is on value with several cards that can support it, expect to see the Essence paired with Nightmare at Noon or Foreboding Glance. There are a few dudes that like Mystical goods at K, I hear.