Warlock question

Alright so I have a question…I was asking for class input on steam for this wanted a chaos type build someone mentioned I should go melee warlock with callidor’s tempest for chaos so question is why is that? Have yet to see really anything supporting that so thought I’d ask here. I was thinking of going 2h due to having a scythe of tenebris.

Chaos-based CT Warlock is only possible with Orb of Chthon

Wonder why they told me that then…weird…Kept going on about how with CT a 2h chaos warlock was possible with melee made a huge post extolling the virtues of the build. Good thing I always research things first or I might of been upset…Thanks.