just finish E6 hard (just for the radar )
thanks to hatsushimo torpedo cut in aim boss



my setup:

for those unlock boss node, i just follow wiki, and i do it after i finish a boss

this time i have record down my resources:
start:
oil: 237k ammo: 292k steel: 280k bauxile: 284k bucket: 2947
finish first boss:
oil: 222k ammo: 286k steel: 270k bauxile: 281k bucket: 2895
finish second boss:
oil: 200k ammo: 274k steel: 264k bauxile: 278k bucket: 2842
finish third boss:
oil: 159k ammo: 257k steel: 246k bauxile: 268k bucket: 2693

first boss about 1 day to finish
second boss also about 1 day
third boss i use about 1 day to final kill, 1 day to finally kill the boss

waste quite a lot of resources / a lot of fail run at third boss
maybe i use wrong setup for third boss kill, or just my RNG bad
i was use 1CA 1CAV 2DD 2FBB 1CLT, then i keep on switch around, like 1FBB 1CLT 1CL or 3DD 1FBB or replace CLT with SS
try this shipgirl and that shipgirl, then i found have SS higher chance to reach boss node

for my ashigara, i only decide to use her just now, just 2 run and 2nd run finish the boss
better use both ashigara and nachi if level high enough

and from what my memory i can recall, 2nd boss do not have the friendly fleet support
(at least i remember i got a few run no friendly support)
3rd boss do have friendly fleet
and E6 here i found a russian BB and a russian DD at third boss node, both also A rank, i guess i no need to come back this map
For those who want to try hard, good luck
For E7, i digest the information first, maybe i will go for hard (or normal )
since i still got 150k fuel and 2000+ bucket (and got 10x Emergency Repair Personnel)
and if i not mistaken,  think still good 2 - 3 weeks...