The Spirit Realm

I just came back to the game after a 3 year hiatus and I was wondering if it was still advisable to grind out AA's at certain levels(and if so what levels/how many).

Also is there any compiled information that breaks down how effective skills are by skill level?(like I know higher specialization is an increased % to reduce mana cost, but not sure what %.)

EDIT: I also noticed they revamped the AA system(no more need to get general aa's to unlock arch, etc..) is there any AA that are must haves on the way up?

Thank you very much for your time.

your lvl, and amount/type of aa's you currently have would be helpful

I personally stopped at 60, 65, 70, 75 for aa's. I'm currently 80 and working on more aa's b4 I make my push too 85. As I'm lacking in lots of aa's in my opinion. I currently just went over 600. There is a good read on aa path in the spell/ aa threads.

Currently 51 with 9aa's(was prepared to purchase the required general aa's to unlock arch but then discovered that wasn't needed any longer).

I left my retired toons retired, and decided to start fresh.