Talk:Isokaze/@comment-26154973-20151010190031/@comment-26154973-20151010192526

Though this is with people who already had/have Isokaze and just get S ranks at the boss after update.

For more accurate estimation somebody need to collect reports such as "after update I get n 1-5 Boss S ranks and finally get Isokaze (which I never had before)", then for m such reports CI can be formed from m / ∑n proportion.