Phantoms

Depends on what you are aiming at. Chaos vellum generally you want 90%pdr for that boss as a phantom since they have no built in or reinforced ignore pdr skills really. Other than that, just build up % atk, 200% boss will already be enough seeing as you have 130% total damage. Total damage and boss damage are additive unless I been missing out on changes to it. The top stats are really %boss > % atk > ignore pdr > total damage. 15% atk far outweighs total damage easily due to how many things we all have already.

Mille PDR hyper still works for all your other skills, at least in EMS.