Board Thread:Questions and Answers/@comment-27202699-20151112191937/@comment-27178686-20151112195756

You might want to check this guide: http://kancolle.wikia.com/wiki/User_blog:Shinhwalee/World_4-3_Power_Level_Guide_for_DD_%26_CL

Also for the bauxite, expedition 6 or 2-2 resources nodes.

I've started a month before spring event, somehow managed to finish it (easy mode ofc). Was somewhat in a better shape for the summer which i've completed the day before the deadline (took a lot of sanity to get Teruzuki but still had to do it in easy mode). Now it's my 3rd event and I'm considering hard mode, if your high level ships aren't that numerous from what you've posted, I recommend sticking to easy for now, of course nothing stops you from trying medium or hard just to have a look at it.