What is your least favourite class and why?

[Adventica6]

Brd for me, I hate seeing them in my dungeon runs/raids, every single time I paired with one the dungeon takes noticeably longer and whatever utility they bring is countered by the fact their dps is half of me or less (i'm blm)
even if they use foe requiem to help me it doesn't change the fact that they themselves have awful dps output, especially on aoe, rain of death is as bad as ninjas aoe.

Mch ill throw in too for good measure, the utility they bring does NOT make up for their crap dps, exactly the same as Brd.

When I got paired with a mnk we literally demolished the dungeon run, 3-4x faster than If i was paired with a brd or mch.

The 3rd weakest class to be paired with would be nin, again, the utility does not make up for the major lack of dps the class pulls. I have done hundreds of dungeon runs and it's never a fast run with a brd or mch, experiment yourself and see.