Here's what my guild does:
We all stack up on the tank around one corner in preparation for the first beam, as soon as someone sees Corruptor, they either call out "move" or "stay." We call out "move" if we need to move around the corner to safety, and "stay" if our current position is fine.
After the initial laser, all you have to do is move around the corner each time, since Corruptor moves around in a clockwise pattern and thus you will always be safe if you go to where the laser just fired.
I hope this helps!
-Hayward