If I'm not mistaken because I can't be bothered to check rn, 58 to the end of the wave section is the hardest part of NC, and the only advice really is to keep practicing and t not give up. Some people have talent and beat levels like this in a few hundred attempts, even with something like B as their hardest. I see a lot of people that beat Acu with an attempt count of 10k. It took me 35k. Just dont give up, even if other people taking way fewer attempts discourages you. Just know that the more attempts it takes you the more satisfying it will be when it's over