So far I'd say I haven't had the greatest of luck in terms of legendary drops. Currently have the Necrofantasia ring, Prydaz and Cloak. Got the Prydaz around 3 hours before the patch dropped that would have made it auto 940 so double FML there.
While the ERW ring is decent in extending BoS uptime, I find it of most use on that initial on pull BoS.
While the ERW ring is decent in that it's useful for extending the duration of BoS (particular the first BoS in a fight) by maybe 20 seconds, I don't find it game breaking for a BoS build and without numbers to support it, I'd probably be putting it around 4th-5th on the list of frost legendaries. Currently leaning toward upgrading Prydaz first (never thought I'd say that) purely due to the secondary stat gain. Haven't had much luck finding a bis lego list backed up by numbers so I'm really just guessing at this point.
So, ring, cloak or neck, what should I upgrade first?