VOID Necromancer Build

1st of all the build is rather experimental and doesn't change a lot except uses Abyss Skill coming from the Void Runeword as an addition to a common Poison and B-one Necromancer.
Necromancer provides the following FCR Breakpoints:
FCR Frames
0% 15
9% 14
18% 13
30% 12
48% 11
75% 10
125% 9
Aim is to get 125% FCR.
Gear is build around the Void Dagger Runeword coming with RotW.
Void provides 40%fcr and the Abyss Skill.
Gear options (My build):
Helmet= Hellwarden's Will with Magic Uber Jewel
Belt= Gheed's Wager
Shield= Darkforce Spawn or Random
Armor= Enigma
Amulet= Entropy Locket
Ring= Opalvein + Raven Frost
Boots= Random or Horazon's Legacy
Gloves= Random or Trang'Oul / Magefist

Skills are the same as any PNB Necro except the Mainhand uses Void.
You are able to clear Herald's without getting hit even when the Mobs use ranged attacks. Also you can c-oncentrate on Bone Spear because entire groups are in one position after casting Abyss. The spell has a cooldown and works a bit like a Blizzard Sorceress. Cast Abyss and then Bone Spear to the position you were casting it to. When your Abyss missed targets you can swiftly Teleport out and recast.
LMK

why do you need Raven Frost? soj or Opalvein or Bul-Kathos' Wedding Band should be better

i personally use 2 Opalvein and horazons Boots
ravenfrost in case you want other Boots