I am still working out a viable "hybrid" DZ build that does crazy NPC damage, and while not exactly a PvP build per se, offers some small measure of "emergency PvP" viability for when I am attacked.
My favorite farming combo is 4-pc HF with Ridgeway and a backpack that has 15% CHD as 1-pc bonus, max CHC, CHD and Armor Regen, and Wicked on talent. I wanted to get to a state where no single talent or skill is unused (the Armor Regen is useless in the DZ), and got real lucky when a god-roll backpack dropped in the DZ that had +5% armor (1-pc set bonus), max armor, max CHC and max CHD attributes. Only the talent sucked, so I rolled that to Wicked. This brought my armor up to 1.8M with only a small loss in CHD, but my conundrum is on the 4th HF piece. From what I can see it appears the 4-pc bonus is heavily degraded in the DZ. The NPC confuse barely lasts two seconds, and I see no effect at all on the occasional PvP.
So I also have a god rolled Improvised Holster that has max armor, CHC and CHD, and swapping that out for one of the HFs loses the 4-pc bonus, but brings my CHC to exactly 60% (not a single wasted percent), and my CHD higher than before at 157% (it also adds a mod slot that the HF holster didn't have). I still have the +15% damage on SMG and shotgun, and the 20% armor on kill, which are awesome in Heroic landmarks. So an actual "damage monster" and really high armor too. Only the MPX has one wasted attribute (Accuracy, which I wish I could swap for Damage to Armor).
So anyway, what would you do with that holster: 4th pieces of HF, or an improvised holster with max armor, CHC, CHD plus another slot (for a CHD mod)? I plan on playing with this for a bit to see how it goes, but curious if anyone else already went through the decision process.