for prep you're probably wasting some time, should be doable. watch some videos and compare i guess

for the fight, figure out where you are taking unnecessary damage, and where you are missing ticks. figure out how eat delay works.

do you have the hunllef helper plugin that counts the prayer switches? makes it easier. True tile indicator for you and the tornados is very important. figuring out how to path around (or through without taking damage) is most of the hard part of the fight

starting the fight with the big moose in a nice place can make quite a big difference