So, upon researching dagger upgrade options for my rogue, I discovered that rogues are fairly limited in T6 and T7.
The 5% drop rate on Vampiric Fang of Blood off Redfang for starters is a bit dismal, although I can live with it. What is most disappointing, however, is the lack of +Backstab Damage on the weapon, which is 0.
Also, Aged Nightfall from Nexona in VP is lacking any +Backstab Damage modifier.
Same is also true of Lilac, Cruel Manipulator from Visath. (also a 5% drop rate, limiting upgrade options again)
Considering that both the Bone Razor (PoFear) and Ifir, Dagger of Chaos(Fennin Ro) have +Backstab Damage modifiers, the two aforementioned daggers are not much of an upgrade when backstab is considered in overall rogue dps.
Now, undoubtedly the regular melee and proc benefits from Vampiric Fang of Blood and Aged Nightfall are straight out of the box better, but they do little to increase Backstab damage overall. I understand the additional damage from the modifier doesn't add tremendous amounts of damage, but I see no reason why it shouldn't be factored in as upgraded stats to higher tiered daggers. Every little bit helps.
And since we're talking about rogues here, I'm having a hard time locating gear with +% to piercing. I want to drop my Beautiful Face augment in favor of a higher AC/HP upgrade, but I can't locate anything with a +% piercing mods. Considering the abundance of other +% mods to include blunt and slash, it would make sense to include piercing in the mix. I would request that at the least, more options are made available in T6 or T7 gear, perhaps placed on Ancient Chain (VP Armor). The Ancient Chain Helmet or Arms would make good choices, for example.
Thanks for any consideration on these topics. =)
Edit: Added Clone links and supporting evidence.