I think we are missing a trick here. DamCon is not a primary, full-time occupation. It is the battle station that someone adopts when there is no other role for them. So the main shift bridge crew is always preferred when going into a planned action or once activated from on-call status. There is no reason that the majority of DC crew could not otherwise serve as security teams, bartenders, cooks, yeomen, technicians, scientists, analysts of various kinds. Also, a single doctor would suffice for maintaining the overall health of 60-80 crew with qualified nurses/paramedics on the other shifts. Also, outside of battle or major operations work, the bridge could be operated by two or three officers.