Some useful site:
Most complete english wikia about Kancolle
http://kancolle.wikia.com/wiki/Kancolle_Wiki
List of every ship and their maximum stats
http://www56.atwiki.jp/kancolle/pages/42.html
I go with 4BB (Kongo-kai, Fuso-kai, Ise-kai and Hiei) 1 CV (Akagi-kai) 1 CVL (Hiyo-kai).
Still cant pass through boss node of 2-4.