Well, just adding my PoV here, but considering how little parry stacking has any effect on the actual encounter (low boost and unreliable anyway : healers can't predict a parry, and use same heals anyway), you are better off with DPS just because reducing the time you have to tank, on the other end, is a good thing, like when you push a phase or kill adds faster etc.

Not to mention that, as a WAR, more attack means more self-heals, which helps a lot more and is more reliable than parry as a whole.

Until SE decides to actually put some thoughts into parry (like, for example, parry stat affecting some of your skills, like say, parry making some of your defensive skills last longer or be more effective), it's a dead weight stat.

Gearing up with parry as your priority, will just nerf you overall compared to gearing up with dps stats.