QFT
And it spreads to the forums. I know PLDs who do just fine on speed run in all content. I know War who don't. And so on and so on. I also know DD who can steal hate off either job and ones who can't. If everyone would focus on the party they are with, rather then the party they were with or saw or heard about, I think you would find that any content on this game can be done with multiple combinations and skill levels.
Stats don't replace thinking. Ever. Find an LS that wants to play with you. Not your job.
If you know someone is weak in an area, plan for the weakness to occur and compensate. If you know someone is strong in an area, plan for the boost and play it up.
Is really very basic group concepts.