FUCK THIS SHIT!
*uses Madoka-style hammerspace to summon tons of mirrors. Lasers are light, aren't they?*
Oh wait, she shoots bullets too.
OH FUUUUU-
The mirror strategy somehow held. Unfortunately for you, Byakuren's got a new trick -- rather than just danmaku like in th12, in th13.3, she's got access to her physical buff magic, and is now beating the living snot out of you!