Warlocks are far from being the best, but they are the easiest class to use. Their jumps were made so you practically cant miss your destination, your Sunsinger subclass was made so you dont need to worry about dying, and your melee range is ridiculous, damaging a person from a mile away, I mean cmon, seriously. You even have exotics made so you can spam your grenades and melees relentlessly during your super activation.