1. Play as the Empire and choose a sniper. Get on a speeder bike and head over to the Temple Command Post. You can ride the speeder bike up the side of the temple and snipe the rebels as they leave the command post.
2. Play as either side and choose a sniper. Head to where you can enter the long bridge that goes across the battlefield. Get on the bridge and find a good sniping spot. You can reach the other teams fairly easily from there.
Friendly fire must be off for this strategy to work. If you are the Rebels, start at the Temple as a Rebel Soldier. Take a speeder bike across the viaduct and go off the edge. You will be located on the river, right below the Outlook. Go up the hill to the Outlook. There will be loads of Imperials, so cut them down with your blaster rifle. The command post will take a long time to take, though, so be patient and cut down any Imperials that show up. Once you have taken the command post, you can attack on both sides of the Imperials, as well as cut off their AT-ST supply.