I had the same issue months ago when Darkhold was released, LNC was my only 50 at the time and after a couple of weeks of getting rejected because no CNJ/THM/ARC 50, I ended up taking a 2-3 month break.

People in a PUG won't want to test out new and strange setups, because they all just want to win and hope for their drops, Linkshell groups are a different matter and a solid group can carry 2-3 players learning the fight with little trouble.