How to make friends with rebels and destroy AT-ATs in Star Wars: Battlefront

I've put thousands of hours into EA and Dice's Battlefield series since Battlefield 1942 came out in 2002, so it's no trifle when I say that Star Wars: Battlefront is the best Battlefield game I've ever played. Religious Battlefield devotees might not agree with that, but I think Battlefront successfully sacrifices a bit of complexity to create a focused, exhilarating spectacle. There are a bunch of game modes in Battlefront, but there's really only one crown jewel: Walker Assault. In Walker Ass...