If you have your own Character Blueprints and you are trying to figure out how to integrate The Art of Combat’s BPs with yours, there’s a pretty neat and credible solution, thanks to Wu Yang (Fogbell on UE forums).
Simply ‘Reparent’ your character BP unto the character BP included in The Art of Combat (recommended), or vice versa.
To do reparent your character BP unto Manne BP, for example: Open up your character BP and click on File>Reparent. Select the new parent BP (Manne BP) for your character BP. That’s it.
If you prefer to make Manne BP a child of your character BP, you need to also copy the Event On Begin Play and Event Tick sections into your character BP (you may collapse them into a graph and just copy and paste the collapsed graphs).
Big thanks to Wu Yang for bringing this up and testing out the solution.
Enjoy!