3 ex fans would scale really badly. JIP, F41~EX FAN, xx, JIP, F41~EX FAN, xx, JIP, F41~EX FAN, F21, NJP, 333, FANLIFT, JP~AIR FAN, FAN, F2~CUTTER does 53% and is pretty tricky to pull off. I'm sure there's better BnB's to throw in there, that's just one I could land real quick for testing. Seemed like the timing gets more strict after the enhanced fans, but I could be totally off on that. Although by the end everything was either 0% or 1% damage, so it probably wouldn't make much of a difference what combo you used.