Quote Originally Posted by R'as al Ghul
Take your HA off skirmish and on guard mode. Leave F@w on. Manually manouver them around the enemy unit towards the map centre. Preferrably with double click. Once they are in a safe position with the enemy between them and the map-edge, turn skirmish back on and guard mode off.
Sounds sensible enough.

The Hun:

Yeah, one or two units keep firing while another advances.