Stay Close to Your Partner
The Bespin update brought some changes to the Partner system and one of them is going to vital to your success moving up the ranks in Battlefront.
Battlefront's latest update notes that "staying close to your partner will provide you with reduced cooldowns for all your Star Cards." If used right, it'll give you a huge advantage over disorganized opponents.
While you're in the game, pay attention to the icon above the character. If an exclamation mark appears it means that you are too far away from your partner. If a check mark emerges, it means you are within distance of your partner. If a cross appears, it means your partner is dead.
Star Cards are one of the keys to battle and having them by your side will ensure you're earning ample experience.