I was playing the other day and stumbled upon this exploit that enables you to get any Exotic with little to no effort.
Step 1: Equip any auto rifle
Step 2: Launch a PVP match (any game mode will do but Rumble works best)
Step 3: Give your controller to your dog or any 7 year old child with two hands.
Step 4: Leave the room and come back 3 hours later.
STEP 5*([b][u]Optional [/u][/b]) If you don't have access to a dog or small child, apply a small amount of duct tape to the controller, works just as well and will get you 3 Gjallarhorns an hour.
Thanks to Destiny Rng you should now have every exotic in the game. YOU ARE WELCOME.