Ah, i see he used submarine tanking for clearing E4. I thought it was strange that Yamagumo is missing from the 2nd page. Judging from he used 3 DD, he might be clearing E4 on Normal.
I would not be able to finished this event on hard without Iyo, as i'm sure the case with so many Admirals out there. But all the arts about this event mainly only about Nishimura fleet, this is the one and only art so far i have seen depicting our unsung heroes of this event.