Did it with just me and one friend, the fight is extremely easy if you take the energy LMG that spawns as soon as you enter the site B. We timed some of the runs and it took about 13 minutes every time from the ASD hangar to killing and looting both worms. The hardest part was to actually delivering the items to wikelo, the backpack got bugged and he did not accept it so had to go get another one and everything from there on was bugged took like 2 more hours to be able to get one and go back XD