mmPandjioo

I found that upgraded hulls on battleships make a big difference in dispersion.But what does the second hull of the Aoba do other than give you 4k hit points?

So i had my broad side turned to a cleveland about 7km in front of me.I was focusing him because he was setting me on fire and when i turned an island,an atlanta showed up right on my other side about 1.5km away,sailing straight towards me.I completely ignored him because he doesn't have torps.Right as I kill the cleveland i turn around to look what the atlanta is doing and guess what,he was trying to ram me and he did but in the panic i had forgotten that i was lit on 3 fires and when he rammed me he died and i repaired everything.I got double strike and die-hard.It was awesome and the atlanta said:you have to die now!

Can someone kinda review the Nagato for me?Maybe the strengths and weaknesses or the playstyle.