Aren't hex+ weapons maxed at 20% now, instead of 15%?
Anyway, this is a half "clean" bow, missing one mod:
Poisonous Longbow, +15% hexed, lengthens poison duration by 33%.
Rare Poisonous Longbow, +15% hexed
Plague
Hell Raiser
I believe while hexed items were always 20% max, VS hexed foes is 15% max
as for the longbow- salvage/merch
as for the longbow- salvage/merch