Normal Attack+ sucks. Seriously, stay the hell away from it. Unlike what it's advertised to do (which would admittedly be pretty dang broken, though Hasty Attacks would still be better even then), it only powers up your R1. DO NOT USE THIS, EVER.
Now the question is, what to use with the free 4000 slot? I've seen Finishing Blow+ get mentioned a lot... how about that?