If the actor is not player-controlled, you dont need movement prediction, and you can just use regular replication, I’ve found this works quite well for things like rolling balls and other shapes, where you want to simulate physics and have the position replicate 
Just make sure
- actor set to replicate
- movement set to replicate
The focus of this thread is a situation where the player is providing input, and therefore the motion of the actor is very unpredictable and cannot be strictly server controlled since the client player wants to control their own character
Very nice to hear from you!
I posted some extensive info in the first page of this thread, when I get more time I can expand on it.
In the meantime I do offer tutoring sessions in UE4 C++ !
You can PM me to schedule