S
It looks like this going up will have each straw hats stop at some level to fight some enemy so the others can go further, getting their 1vs1 battle, or 2 vs1 battles. First floor nami, usopp would have to stop to fight numbers, then franky fights in second floor flying 6 member, then when they get to Queen either zoro or jimbei or both stop, then sanji gets with luffy to king since he can fly luffy up there, stays to fight king and luffy goes up.