User blog comment:Kuras/Fall Event 2016/@comment-30588301-20161124150059/@comment-25289497-20161124151829

If that is the case, and you have multiple other CLs still available, try saving her for E-5. Only if you absolutely must, then I would use her in E-4. I sortied her to E-4 mainly for night-time torpedo cut-ins, but it requires quite a bit of luck with her default 20 luck.

If you do have Nagato and Prinz Eugen, Sakawa might not even be needed for E-5. Also, there's a debuff mechanism in E-5, that should also help a fair bit. I don't think Abukuma is necessary for E-5 at all. :)