User blog comment:Hayashi H/Spring 2016 Event Guide/@comment-26486243-20160524084300

I was thinking of using the Final state of the map to fix the BWS II variant of node D on Easy, since it has the highest drop rate for Oyashio. Unfortunately upon backcalculating sample sizes from the drop rates, I got the following results: Size Variant 44066 528 (Wo Flagship II) 43172 614 (Wo Flagship III) 36395 615 (Wo Flagship IV) 14870 616 (Wo Kai Flagship II) Total 138503 attempts from backcalculation, actual sample total 138487, so it's very close.

Since the number of attempts for the highest Oyashio drop rate version of the node is the lowest, and people who want to farm for her will use any method at their disposal to raise the drop rate, it is relatively safe to assume from the attempt numbers that entering Final state will probably not fix the Node D BWS II composition, leaving repeated farming while praying for a BWS II composition as the only practical way to obtain Oyashio.

If someone has actually fixed the map in Final and tried to farm for Oyashio and found the BWS II node actually can be fixed, please let me know. In the meantime from the inductive stats I'll have to assume for the time being that it is not possible to do so, since I no longer have enough resources to test this explicitly.

Should I get denied Oyashio for much longer, I may be forced to clear Normal like a scrub on the last day instead of being able to attempt Hard, due to resource considerations.