I assume the the staff is vertically on your back correct?
As you duck and spin, I take a step back with one foot, the first one that you would have swept while lifting my other leg and kicking your side with it. While doing this, I unsheathe Soul Eater with the arm opposite of the side its sheathe is on, allowing me to use it to upwardly slash you while bringing it around.
Bad assumption, it's horizontaly on my back, that's why I have to twist my body in order to get it vertical, so it can lift me.
As you try to kick me, I block the side of your foot with my forearm.
(let's say left arm, and let's say i'm spinning from left to the right, wich means you're kicking with the right foot, if that's ok with you.)
It deflects you to the side, spinning you 180?, meaning i'm now facing your back. I then strike your back twice, injuring your kidneys with gentle fist.