Thank you for the reply.
Not sure if is the same of what I’m doing. I have the parent controller that has the blackboard and behaviour tree, the blackboard holds the variables that all AI will have in common (health reference, damage, player location, etc) although the BT is completly empty. On the child Controllers I run the behaviour trees that I create for every enemy. So enemy A will have BT_A, enemy B will have BT_B and so on. But I feel like the parent controller is not really doing anything besides holding common variables but at same time I didn’t want to create new variables or anything that the enemies will share. Hope that makes sense.