User blog comment:SlashZero/Spring 2016 E-7 Hard Pre-final & Boss Farming Composition/@comment-24894280-20160525082405/@comment-861160-20160526152949

Well, depending on how badly day battle went there's maybe 1/4 to 1/1 chance for Bisko to aim at the boss (assuming she's not taiha). It's still pretty good odds of hitting Central.