After four hours of experimentation, content creation, SHEER CHAOS, I was able to crack the code with two different mons for the Rillaboom Raid this weekend: Corviknight: Tera Fighting; up in HP, Attack, and Defense; Taunt, Iron Defense, Screech, Body Press; use Taunt turn 1 unless shield goes up, Iron Defense at least twice or until stats reset, then Iron Defense three times, heal as needed, Body Press until shield breaks, Tera and proceed to Body Press! Skeledirge: Tera Fire; up in HP, Defense, and Special Attack; Torch Song, Flamethrower, Will-O-Wisp, Mud Slap; CHANGE ABILITY TO UNAWARE (didn't realize that was a thing until I randomly came across it on the Internet); Will-O-Wisp turn 1, lower accuracy with Mud Slap until shield goes up, use Flamethrower and pray for a burn until it happens, Torch Song until shield breaks, Tera and continue to use Torch Song or Flamethrower to restore burn if needed! Good luck to everyone! Hope someone found this helpful! Make sure to like and follow!