Hi Omorote, my combat system was made in blueprint only, and now, besides its working, i´m needing to make a lot of tweaks and certainly not very practical solutions to make this work and escape from some crashes in the engine. If i need to remade this i will use traces instead of overlaps like i´m using right now.
And dont get me wrong, i will help you , but all depends of a series of pre made decisions , like how do you control your animations, your variables in behavior tree and so on, do you know what a mean ? Its not just a " take my blueprint " thing and its all good. Its all interlaced, and thats my first complain about Unreal (certainly because my lack of experience) … You cant simply use the variables of your blueprint directly . The way you need to get those values and always replicates them in the other systems (Behavior Tree, Animation, etc) its to bureaucratic in my opinion, hehehe.
If you have Hangout we can try a chat (if you excuse my poor english vocabulary and lack my of good english conversation skills 
).
Or just post in my thread whatever question you have and i will do my best to answer it , can it be?