It won't be Reaper but I think a melee dps could primarily be a support class with low damage offset with many partywide buffs to other people's heals, mitigation and overall dps. Haste buffs would also be nice.

I think players would appreciate a Red Mage styled melee job that is simple and easy to pick up.

Red Mage is very much a casual job with very little nuance and is also good for progression.

Most support playstyles are held by healer classes though.

Only real support skills you really see are for damage when it comes to Ninja or Dancer.