so i finally finished E-3 and went E-4 easy. however, the drops(esp on pre-boss and boss) were shitE-4 is easier than E-3 in my opinion. You don't have a shit preboss and your route is fixed with 1 FBB 1 BB 2 DD and 2 CV. (so was E-3 with whatever comp I don't remember)
thinking of going medium again but my experience with E-3 scarred me.. is E-4 going to be much more painful?
The only problem will obviously be the boss ...
CV Hime can and will one shot whoever she wants. The fact that you only have one fleet makes the boss harder to deal with. Ultimately, you can go yasen with cut-in setups on lucky ships and pray for the fatal hit to happen.
Don't forget the support expeditions along the way if your resources are high enough. Also, Unryuu drops on this map.