Mine went something like this:

I moved the southern army near Taras and sent the fleet to pick up the northern army, which I began moving to Brettia. On the second turn either the Epirotes attacked the southern army, or moved most of their garrison out of the city. Either way they were beaten and the survivors holed up in Taras, which I put under siege in the same turn. The other army was about halfway on their journey. In the autumn of 271 BCE I took Taras. By winter the other army reached Brettia, and in the spring they layed siege to Rhegion. By autumn of 270 BCE, the town was mine. It was in a hurry, but at least it's doable.