I want to see Mystic Knight.
Tank class wielding a double-bladed staff that utilizes elemental stances/alignments (Earth/Air/Fire) and swaps between them to enable different abilities and swap out the additional effects of abilities like the finisher in their melee combos.
Their animations should be somewhat acrobatic sort of like MNK and their job specific outfits should have an exotic look to it that is a mix of far and middle Eastern, with the helmet being an armored turban with a veil/mouth-cover as a throwback to their classic look.