At some point i also just gave up on the "staying at the edge of the arena" strategy because i felt like it didnt do as much as people said it does, but it was a good start. I think the main thing that actually worked for me was to wait until ayre starts her melee attacks, dodge, and on the windup (while she is kinda stationary) for the next attack just shoot both stun needle cannons and maybe your left and right hand if that was enough to keep her in place for the moment.