I have nothing against being new to a job, or content. We've all been there, we've all been new at some point - but please, before you join any endgame content, have a basic grasp of your job so as to not grief other players.
For me, I honestly hate getting paired up with another AST player who has no idea how the job functions and is constantly negating my card draws with theirs, or switching to the same sect as to negate our aspected aoes. Since they have no idea how the job works, it leads to just a lot of wasted MP and card draws.
Frustration level off the roof.