I have tested this with multiple melees on warlock and it seems that for whatever reason Arcane Needle will not proc Facet of Bravery and give you Strand Weapons Unravel rounds. Personally I am in love with this fragment and I love running Strand Void Hybrid builds right now with this fragment often being the center piece. Sadly for my Warlock Arcane Needles will not activate it which is a shame because there flexibility makes them and ideal choice with this fragment. Hope this gets fixed before the season it over.