From my experience with Arklow Shipping, up to 5000dwt, we carried a master, ch officer, engineer and 3 AB's and occasionally a cadet.
Cheers, Dan.
Ps, really miss the tramping around various ports, back then it wasn't 24hr operations in port, they were the good days ! Missions, meeting other crews from various vessels in the same port and above all a good few drinks !!!