When I'm learning a new fight, I literally take notes. I have plain text files for every extreme and savage I've done.

Look at the attack name, and then look at what happens when the attack goes off.

My static did a blind run of P4 normal together. We died on the first attack, and then discussed it as a group.

"Okay, so standing IN the lightning bolt wasn't the right thing.... maybe try standing away from it? Katarh, you try standing in the opposite corner, Illsaide, you try standing on the corner across the way.... "

By arranging ourselves differently, we eventually figured out the mechanic, and knew what to do next time so we wouldn't die to it.

Repeat this x100 and you have blind prog.