The Karnstein Armlets are among the stronger melee Exotics available to Warlock, though they do have limited utility in more difficult content where getting within melee range isn't really a good idea. Warlock Exotic - Karnstein Armlets: melee kills restore a chunk of health and trigger health regeneration for several seconds.It's hard to argue with temporary immunity. The Antaeus Wards ate a well-deserved nerf a while back, but they're still a pretty powerful PvP Exotic in the right hands. Titan Exotic - Antaeus Wards: improves your slide, and grants a reflective shield when you slide after sprinting for a short time.They can only refund half your Super bar at most, but that's still a pretty decent chunk.
If you want to throw as many souped-up knives as possible, the Shards of Galanor are for you. The cadence of its bursts takes some getting used to, but you might find it hard to go back after using it. Vigilance Wing is basically Trials of Osiris: The Pulse Rifle, so it's no surprise that it's pretty darn good in PvP. When a nearby ally is killed, you gain increased movement speed and health regeneration. Here are all the Exotics Xur is selling this weekend:
