/jp/ - Otaku Culture

Could somebody help me figure out how to approach Junsui naru Kyouki? I'm specifically having trouble understanding the behavior of the second wave of lasers once you're pinned down by the straight ones. If there's any kind of pattern to where they decide to go I haven't been able to find it, and if they're random I'm not sure where I should be looking to prepare for them.

I'm playing on Hard right now if the spell works any differently on other difficulties.