I've yet to unlock 3-5 and 4-5 (not planning on 5-5 for now), so that I can get at least 1 blueprint per month. To unlock 3-5 I need to go through 3-2, 3-3 and 3-4 first. And for 4-5 I need to clear 4-3 and 4-4. And ofc clear those EOs once I've unlocked them. That was what I was planning for September. I also wanted to start doing regular LSC, but I guess that'll have to wait.
Welp, good luck to ya. As for LSC, well my comment is that Taihou's recipe yields me several IJA ships while the pheonix herself remains elusive, for better or worse.
That said, now I have the SALTIEST BLUEPRINT EVER, at least the saltiest I've had experienced thus far. Penance for clearing maps at bare minimum difficulty I guess.