Talk:Abukuma/@comment-26481620-20150717112917/@comment-2.97.115.225-20150717214720

3-5 is very much worth unlocking and clearing ASAP. South route hardly costs any resources to clear, but expect to spend a few buckets.

4-5 and 5-5 can be very expensive to clear, both resources-wise and buckets-wise. I wouldn't bother until after the event, and only if your ships are high lvl enough.