I’ll make this quick because i’m not sure about this weapon’s near future. This is not a full guide, more of a weapon test. A guide on Morgoneth Infiltrator can be found in here. For a good Bane of the Winter King build look over there.
This sword was probably one of the two best two-handers in the game with it’s all around decent stats and whooping 18% cold RR aura which is much more powerful than any RR proc usually found on weapons.
This patch the sword received an addition of up to 9% CDR making it even more tempting to forge a Shadow Strike build with it. So here it is:
SS cooldown is 1.5 secs
Crucible 151-170 performance:
Poison conversion from Morgo set combined with 22/12 in NJE and Nightfall provide high frostburn for a low cd SS. -93% cold resistance aura together with reliable Rumor and 20% RR from the Viper act as a multiplier for that high frostburn. It allows for fire-and-forget gameplay against any enemy with low cold resistance.
For comparison, same build with a very rare, CDR dedicated weapon for Nightblade (with very good mutators):