A cosmic Slot3 with Critical hit + 1%Dmg per 50 spirit + Critical Damage + % to gain 800 dmg, 10% attack/move speed provides a huge DPS spike for this build.

or   or are good substitutes for Stone of Jordan (Graduation ring is probably the best choice DPS wise, however, it has no HP roll, I'd go with Sling-Ring for a balanced build), however, if you have a SoJ I really suggest using one.

Rotation : Start with Unmake Reality to fill up the Chaos then Beasts from Beyond + Chaos Rift + Ravenous Binding then hold down Chaotic Hex and tap Chaos Blast every 1.5s/2s, after 8s cast Beasts from Beyond + Chaos Rift + Ravenous Binding, rinse and repeat.

Kurse 1:05

Skrull 1:46

Ultron 2:06

Cosmic Dummy TTK 1:22