there are certainly ones more important than others, but most of them are pretty important.
I do go over some in the mq2berzerker vid in my signature
matching your focus AA with what abilities you're using is important
anything that does frenzy is important
intimidation, decap, deadly aim, everburn, frenzied volley, braxi etc
tl;dr - i do brute with a "bank" of like 200 or 220 and do /aaspend order 53214 and if i am working on something specific i'll manually spend as i'm letting aaspend brute