If you are at 16 motes and need the Exotic Mote that isn't Dropping, Store your 16 Motes in your Vault and then go kill the last boss you need or place your last Traveler at the speaker podiums. My clanmate couldn't get the exotic Mote until he stored the 16 then went back to kill the last boss he needed and it dropped immediately. Hope this helps. 💙 Plz bump for others to see :)