Okay after some experimenting and stuff, my personal way of clearing E-2 is as below.
2 CV (Souryu 73, Akagi 73)
2 CLT (Kiso 66, Kitakami 63)
2 BB (Kongou 65, Haruna 65)
Basically I found that this set up will ALWAYS push me to the NE node which requires you to fight Kirishima. For the first node you can use Line Ahead to kill the enemy ships fast, once you hit Kirishima node, use line abreast to conserve your health.
You just need to get through Kirishima with the most amount of hp, don't need to really to sink her. Once hitting the E-2 boss node, do the same using line abreast and survive through to Night Battle, my KTKM one shotted Haruna.
I tried using Line Ahead formation in my previous few attempts and I got decimated so fast that I almost strapped a bomb to myself.
So not sure how about you guys, any personal views ?
I feel that it might be good to swap out one CV for a CA or so, I only have 2 CLT so that's why I couldn't try the 3 CLT strategy.
And seems that certain setups like all SS team will always push you to the NE node, my setup also does that a lot.