Is there a way to target mobs by clicking on the minimap? I am aware of the overlay, and I am using it at the moment. Unfortunately it does not display all my maps.

The left ctrl or alt key. One of them puts all the names of the mobs on the map, while in that state you can click to target. If I remember right, as you move your cursor around the closest mob gets highlighted and when you click that's the one that is targeted.

It basically displays the first map in numerical order that it finds for the zone. So if you have some bad map files that don't have data in them it can screw it up.