We did it in Caitsith you can do it too!!!! Easy BC, we just did drops same way as Nyzul.. but drop rates are really high Body dropped 5/6 runs, and you can do it as much ops tags you have 7 max, and they renew every 15-20 RL hours i think not sure.
Oh P.S. Our Sandy past had control of the 4 regions in northlands, another LS member wanted to join us from Bastok nation. She also had Medal of Atlanta Rank but couldn't get Ops Offensive Mission from NPC due to Bastok not having 3+ Regions at least. So not every nation can do it, they have to own at least 3+ in addition to having one nation control all 4 northlands in order to get the quest. So it's probably wise to switch to an active nation that always has 3+ regions owned.
Anyways today our tally basically much sucked we lost the four northlands, but we did take over throne room (S) got the allied ring, for 15k AN under Medal Rank not Medal of Atlanta. what sucks is you can't get it again it seems until next tally so you only get 5 charges out of it then your done until next tally. Not sure it's not confirmed but I sure can't get another one lol..