Hey @Lordexhavier!
First you need to define what makes an actor the “initiator”. Because when an hit event is generated for a specific actor, the hit normal is biased towards the said actor. When you visualize the hit normals from the hit events of two actors that collide for example, you’ll see that there are two hit normal vectors that are pointing to the opposite directions. So the hit results aren’t enough to distinguish the actors based on which “initiated” the collision. Which brings us back to the question, what do you consider as an “initiation”?
Perhaps what you wanna do is to pick the actor with greater speed, or the actor that’s facing more to the impact point?
These are all that can be said so far, it’s up to you to decide what makes an actor the “initiator” of a collision. Let us know if you need any help translating the logic you come up with to blueprints though 
Hope this helps!