Enter the fight without any information in advance and wipe after 10 seconds. Then watch a video and trying the fight out again. After a few hours of own experience, watch the video again for details you may have missed or couldn't bring into context without seeing it with your own eyes. Then wipe, wipe, wipe and adjust your party setup till you win. Talk to each other about good AND bad things that happened and do not be afraid to talk about weak spots you have identified.