Nash:
A+ Heavy damage
A Continual Attack
B+ Accuracy
B+ Swing
B+ Damage
Has 2 open rune slots for double strike and warrior(Or killer if you want).
Juan:
S Heavy damage
S Continual attack
A Swing
B Damage
But only gets one open rune slot for double strike. And you have to wear something that cancels his waking rune. Very close but I find the extra rune slot pushes Nash ahead.