Allison... you're still trying to fight with power, as an external instrument, a weapon separate from you, to your detriment. Incubus, I think, did actually quite recently give you the correct and honest (albeit for his own manipulative purposes) advice for situations such as this: "You are a demiurge, a lord of the world... you must break power, and make it your own".
Cool - I anticipate a KILLBOSS style kick defense incoming! ( I mean, I'd prefer Allison to remember that she's a Goddess of Shapes and Wielder of Names, and just Divide her opponent from proximity / threat / existence... but that's probably for a later fight)
I think Allison just realize she didn't have to kick sword-guy's ass to win-- she just has to knock him out of the ring. So a last minute super-dodge to let the guy's momentum carry him off the edge may be something she can do without arms.
Orrrr... she has been trained in supernatural headbutting style previously, and it was good enough to defeat the keepers of the gates of Hell. And it would show she can channel Incubus’ lessons in the world.
But, yes, getting out of the way of the overconfident airborne jumping man with no way to steer will work too AND will allow him to come back once again in a new book.
Sidestep is a wise choice when faced with a charging enemy and a "Look Ma, no hands!" combat situation. Also allows for trip and kick attacks as a follow up move to punt them out of the arena. Cautious, but uses the enemy's own momentum against them.
Unless there's a 'Noodle Arms' fighting style that evolved to counter the weapon used by Alison's opponent?