I'd say it depends. If you're going for the AEGabriel Titan (if you don't know what I'm talking about look up AEGabriel on twitch) then Titans But otherwise I'd say hunters because the PVE abilities we have all suck ass. Even in pvp, only a few things are good like backstab, QuickDraw, (occasionally when they work) trip mines, and golden gun Warlocks are definitely the easiest, and typically the best. They have perks that allow for many styles of play, self Rez being the most important. They're grenades are incredibly good, especially fusion, which tracks like a mother -blam!-er (why doesn't flux track this well? Because -blam!- hunters...).