Energy Overdrive (f+2,2 (rapid)) and 3rd Spear Knee seems, to me at least, easier to execute if you set "Input Window Timing" to "long" or "medium". Try that.
I don't want to seem rude but I legit don't understand how this could be the case? It's just a quick double tap of a single button + forward.
I realize I'm quoting a super old post but it caught my eye.
try and use your index finger to get the feel and then switch to your thumb. it helped me truly understand it for some reason. its comboing for me that's difficult. it seems after her launcher you have to walk forward a little for some reason I cant get it. granted I didnt try for more the 5 minutes