PassVariable From Actor to Blackbard?

Merry Meet,
Here is the idea of what im trying to do.
I have a variable in my monsters (Actor Class) that will determine if the player is using a flashlight or not. As some monsters are afraid of light while others will see you sooner I need to change the vision variables such as radius on a nav mesh.

This is my logic so far.
Monster Parent controls all variables held by monsters
Child Monster holds all the variable data (From being fetched from a data table)
Some of the variables needs to be passed into the behavior tree to change things like vision range.
I am using an AI controller to use a behavior tree along with a Blackboard.
Because the value is set up in a child actor I am having a hard time passing it to an AI controller or Blackboard.
Because many monsters use the same AI Controller it will need to pass from the child.

Any help would be great!