whatever you want, that's the beauty of freedom of choice.

you will get a range of opinions here

RR,VV,GH,APOC, AandO, etc etc etc

then you gonna get answers that vary upon what you are fighting.

For instance i just got done with my 85 kannagi so for sobek i was using RR,Einherjar, and Siren Shadow

when i'm out just messing around i use RR,GH,VV alot

or maybe i'll use Apoc in there in place of one, or maybe APoc and Alpha Omega.

theres other stuff that factors in to like what weapon skill is your prime WS, do you have Blade: Hi or is Jin your best.

Do you want to beef up your WS damage or you melee dmg? Atma is situational and personal preference