1) Grab the area below the sign, something will slide, then try to find a way to seal the mindblast rod without hostilizing the 2 cowardly Trang guards. It can be done if you study the problem long enough.2) The demon doll and high voltage transformer do not exist. Crock sells an oscillator, or something that sounds like a transformer but isn't.
3) All Gadgeteer ? And nobody can teleport ? Try switching away from omniguns to bows or slings and save the omniguns for special occasions. Without teleports you will have ammo problems.