Game modes - Best -Fighter Squad (Best XP but only as rebels unless you can get hero power ups) *Only mode were you can kill bots for XP/ By far the quickest mode.
Heroes V.S Villains (Good if you constantly go after opposing heroes bad if you play for your life)
Droid run (Very good for XP especially if you run around and capture "droids")
Worst - Regular modes I.E Drop zone ,Cargo,and Blast are mediocre unless you are very competent in said modes.
*Kill streaks = more xpLoad-out Traits Scout ( A fantastic trait for staying off the radar)
Bodyguard (A very useful trait if you are looking for a more surviveability loadout.
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Make Sure you do you're Challenges and do not be afraid to Get new challenges Guns - (DL-44 or really any blaster pistol unless your challenges are for another type of blaster)
Star Cards - Jump Pack(Number one) Impact Grenade Homing shot, Thermal detonator, Bowcaster.
Charge Cards -
Scan pulse (Find enemies quicker resulting in more XP (Note: If you chose to go this route it May cost you a lot of Credits.)
Explosive shot (A very good and almost always useful charge card Especially useful when enemies start to swarm you.
Note: Every lvl takes 1,000 more score resulting in approximately 80,000 score to lvl up once you get to 49 to 50