If anyone is still attempting to get these achievements PM me on xbl at DANTHEMAN1515. Its so frustrating being a person who came back to reach near the end of its life cycle, and having no way to play the dlc maps or attain the achievements. The multiplayer based achievements need to end in the form they exist in now. Do random action on map x isn't fun nor is it challenging in a gameplay sense. It is simply frustrating.
Some of these issues could be alleviated if 343i simply added a dlc playlist back to reach but I dont think they give a **** about that game with h4 a month away.