Destiny 2 Warlock BuildSwarming Rainbow

Exotic Class item: Osmiomancy + Swarm

You could instead use Swarmers if you don't have this roll. Energy and heavy don't really matter much. I prefer to use a Physic+Incan No Hesitation for the melee energy from Facet of Balance, Restoration from Physic, and Firesprites from Facet of Awakening for more grenade energy. You could use any Demo energy for more grenade energy as a substitue. Then I use Commemoration to spawn Void Breaches for more class ability energy. Depending on the situation, I'd swap Facet of Honor for Facet of Dawn so you also get Radiant for a boost in weapon damage.

Threadling builds are generally better on Strand, but the added suvivability from Feed the Void is too potent to give up to me.