For Prydaz, be aware that the new artifact, Heart of Azeroth is also a neck that will gain ilevel as you level it up, so you will be losing some stats. I may opt to use it on some caster alts, but it's not much of an issue for me, as I wont use it on my rogue (shoulders/cloak will one shot almost any npc). I also doubt I will use on DK or Pally, as mass pulling tank (fastest way to level imo) that can heal, wasn't having any issues before 106, on beta.
Heart of Azeroth @110 (level 1):
ilevel 280
69 Str/Agi/Int
104 Sta
129 Crit/Haste/Mastery
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Not that it will matter, cause prydaz stops at 116, but here it is at 120 (level 13):
87 Str/Agi/Int
165 /Crit/Haste/Mastery
Prydaz:
ilev 265
91 sta
77 Crit/Haste/Mastery