One week , 50 sorties and one boss fight where the S was within reach . And it stopped at 11 hp . I snapped , went all out with fighters and more fighters on my CVL . Reached 400 air power . Topped that with Isuzu in antiair berserker mode . F . those abyssal bombers ! Loaded best girl Haruna with gun , ap and seaplane . Brought out the mad dogs Shigure and Yuudachi loaded with torpedos and star shell . Then I filled the support fleets with every BB , FBB , CA and heavy DD I had left . To end it I gave the girls so much sugar that they sparkled at 100 and bounced around on the screen . Or perhaps its my eyes after the third can of coffee . Made it to the boss with only three green ships Haruna , Isuzu and Shigure . After the day battle I had 200 hp left on the boss . And only one working ships Shigure . Shigure delivers with a torpedo strike that deals 300 damage . Asakaze as S level drop and I have 569 fuel and 826 ammo left . This have been a bad week . My only advice is to go for broke . Everytime I tried to sortie with normal sparkle , I only reached the boss one out of 5 tries with 34 damaged ships . A level after A level and a horrible resource drain . The S level finally showed up when I went berserk and maxed out on all . So forget logic , planning and resource conservation on this map . The RNG is so horrible that ordinary thinking wont work . Just go mad and hope for the best . Good luck .