I’m a Warlock main and Void and Stasis are the best subclasses for sure. Devour is brilliant for solo play and Stasis double turret build is fantastic. Solar can be powerful grenade build or healing support build. Arc is fun but they dropped the ball with Chaos Reach being useless and tickle fingers being an immediate death after the initial jump and pop as a panic super. They definitely should do more work on Solar and Arc but Void and Stasis are both very powerful and useful.