Yooo!
So, I did the lighthouse last night, and boy did we get WRECKED! It was impossible, but we somehow came over the impossible 800 deaths later.
This may have potential spoilers so if you have yet to do the raid and want to keep it a surprise, please don't read any further.
There were a few mechs that I didn't quite get and was wondering if any of you have thoughts, et cetera.

1.) The water one (I forget his name). Had this really big water aoe that I just seemed to love getting caught in. Did you notice any visual or written cues for when this happens, or how it'll be aimed, etc/?
2.) Gigas, I forget the name of the spell but all of the tiles become clocks. How does this one work?
3.) Construct 7 I HATE THIS ONE. He summons 4 # platforms (1-4) and changes your HP. My HP was turned to 5 so, like, everything he said just didn't work. :| What do you think about this one? If your HP doesn't pertain to any of the things he says, should you stay out of the platforms or...?