Parry is still terrible for DRK and is a terrible stat overall. Reprisal and Low Blow are such a miniscule part of your DPS that it does not matter, you can reliably proc Reprisal ON COOLDOWN even without any parry gear because of dark dance and your base parry. Low blow is only 5 seconds longer than Brutal Swing for the same potency, so again, not a huge deal.

If you stack parry to increase your DPS because of procs, you'd still being getting less returns per point than if you went with crit or det. Yeah, you'd be getting slightly less low bow procs if you went that route, but your low blows would still be doing more damage (And it's still like....3% - 4% of your DPS is from Low Blow procs?)

But at the end of the day, secondary stats barely matter outside of reaching accuracy cap and certain thresholds (with spell speed or skill speed). If you can avoid parry or something and you feel like it, then do it. If not, not a huge fuckin' deal.