Okay let me see what I can remember. There are basically three attacks coming. A series of slow moving shots, a sweeping laser that you have to duck, and a big lunging swipe that you have to dodge.
Continue circling towards whatever angle makes it easiest to keep an eye on all three. The key I would say is to be ready to either dodge or duck at any time. If you are already moving, you might avoid the slow shots but you might have to dodge them. Then just be ready to dodge the lunge and duck the laser.
Shoot the bulky unit on the chest to get the armor off. It's blue underneath. Shoot that. Use your eyes and look right at it. I think the blue arrows that are on the table might be good for that. If you can't shoot that, shoot the boxy thing on their rump.
That's all I can remember about how I did it. Now set forth and conquer.