With the release of the Witch queen I am going to go over a build for each class using the new and improved void 3.0 subclass update. To see a very good void build that is utilizing the glaive watch the video below.
one of the best builds for warlock is using the Controverse holds this build clears adds and gives you back your grenade energy. This leaves you with almost no cool down time. Which means unlimited grenades.
To see one of the best titan builds in the game right now watch the video below it's nuts.
This Build by far is my most favorite to use when I am playing on my warlock check out the video below to see the build in action