Having a primal i90 weapon is not a good enough filter for DFing any primal As stated before, the selling business means that having completed any fight in the game means nothing to your ability to play, as a rule. T5 is usually an exception as 7manning it is really pushing it.

On the other hand all ex primals can be 7manned very easily, especially garuda and titan. You actually have a LOT of place for error in garuda ex, except for the MT if he takes the add on top of garuda. The fight can be 1 healed, and 3 dps can be enough if they are really good i guess; so whatever your role, if you are in a good party, you can slack, and that isn't even counting for sell runs, as said.