(39) 's Extra Blueprint Nodes for You as a Plugin, No C++ Required!

That is extremely disappointing… Thanks for the info though.
Anyway, for other people, to disable an actor completely:

  1. set actor hidden in game: true
  2. set actor enabled collision: false
  3. set actor tick enabled: false
  4. add triggerboxes to your level to set/unset the above 3. And don’t forget to also disable enemies/AI manually (and projectiles and such!) as well or they’ll fall outside of the level. Very messy.