Voids nowadays build mom and mael, Void can farm.
Chrono also means Void can contribute to a teamfight no matter his farm.
A under farmed CK is a low armor rng melee stun bot, with horrible mana and expensive mana costs.
Helm of Dom doesn't make Drow a flash farmer.
Also, why are we comparing a Void with 6k in items to an under farmed CK?