User blog comment:SlashZero/Summer 2015 E-3 Hard S Rank Pre-final & Farming Composition/@comment-25477086-20150823053121/@comment-861160-20150823141050

More consistency on the way there, less bauxite costs, higher artillery spotting trigger rates (which is what really wins you the boss), plus CVL aren't that good because they will often run out of bombers and even if they don't they don't have all that much punching power anyways.