Hunters' Ridge - Roman Dispositions

Here is my setup - a veritable thin red line

Perhaps I would be better off trying the same setup, but moving the whole force one hex to the left.

But that would leave my right vulnerable to a rush by the Dacian cavalry, who on that flank are just four hexes - two moves - from the ridge.

In any event, stopping any of the enemy getting onto the ridge at any point in the 12 turns of the battle, looks a tall order.