With the right setup and decent equips it's not that difficult, but what makes this map bullshit, like most of Kancolle, is that it relies almost only on RNG. Yes, E5 is RNGcolle at its finest, mediocre gamedesign choice, very specific equipements requirements etc. I got lucky because i didn't need that much runs to complete it, but i really feel for the people still struggling on this map or E2. Onto E6 and E7, but i will probably clear them on easy because aside from getting fucked up by shiplock for e6 anyway; past e5, the rewards aren't worth the amount of salt..