So I've switched strategies for E-2. Instead of double line everything but the night battle node, I'm doing double line the carrier node, echelon the night battle node, and line ahead everything else. Seems to save a bunch of time, since either one ship gets redded right in the first node, saving me the trouble of getting miscellaneous damage on a most of the ship which spreads out bucket usage, or I somehow cruise all the way to the boss with everyone beat up :V
Cons: Augh, my steel and bucket stock are actually declining from day to day now ;_; though that might be because I shifted one expedition fleet from the first area expedition that gives steel, ammo and bucket to #9 (buncha fuel and up to 2 buckets, but takes longer) since my fuel was declining. My stock of buckets ain't too big, but losing a net 4-5/day seems managable, I still have like 15 left so once weekend hits/once I realize there's no more homework for the week I'll swap both expedition fleets back to the short duration expeds that give buckets, that should allow me to last the event.
Pros: As of now, E-2 only has 1 bar left, plus the tiny bit on the left :V I think in E-1 even in that state I'd still need to sink the boss twice more to clear, but that shouldn't be a serious problem. Pretty sure my fleet's been able to sink the boss flagship every time I've reached the boss node until now, and it didn't even survive the day phase last attempt :V
In other news, item crafting is still laughing heartily at me. I craft 4 times a day for dailies for the buckets, and still since the post where I got a midget sub, the best thing I've crafted was a 35.6cm cannon. Which I can easily pry off any BB drop. :I