As far as getting an L goes, right about now the only way to break into an L if you don't have one is sell everything you get for PS, farm about a thousand mags, and get ready to spend about 300 ps for a tower lethal or if you have a team that can get a 90% win rate in pvp a thousand mags for pvp lethal. I wouldn't even try for raid unless you have a couple hundred bucks burning a hole in your pocket