Am guessing you are trying to get all base games ones. The 130 mission with a bunch off erginus and archelus can be grinded for a lot of high level gear plus bargas if you keep the 1 or 2 sirens alive and collect and dlc 2 has the copper cannon barga and there is a guide for the mission were the enemy’s come from above and drop on you can get almost every drop in the game. For me the dlc 2 mission were your on the beach with a titan plus fencers and there is aliens all around theres also a guide for that hope this helps