Since I'm a Stalker I decided to check out the OP's Game History and discovered a few interesting things. The first being that the OP barely tried to hide their Identity. The second being that Starboard had gotten a comparable amount of kills to the OP (OP: 33 kills Starlord: 29 kills) so it can be assumed that he put in a comparable amount of effort. Also, 33 kills is fairly low for soloing half of that strike, whenever I end soloing that strike I usually end with about 200ish kills. Third being that he didn't even do the Strike 4 times in that session, that was his second time doing it in the Session, which means there are 2 possibilities. Possibility A) He's lying or forgot how many times he did it. Or possibility B) He had loaded into The Echo Chamber Strike three times but left twice, which would mean he was ok with losing his vanguard streak and therefore wouldn't have any problem with just leaving.