try beyond / ultimate and baying moon and you'll be a blm so you won't just stand there and watch while the mages kite/nuke
go for MDB/elemental resistence and you'll laugh when you see a ga4
go for RR/GH and whatever you like to do great damage.
experiment. play.
atmas let you be situationally geared without complaining for not having 500 inventory space, and it really depends what you're fighting and what's your gear
btw, RR is a MUST 99% of the time, if you're meleeing without that you'll be disappointed