Your highest skill is the most important thing you want to look at. Try not to get a lot of exp because you will just stay the same rank, in the game there are two types of playlists, ranked and social. Ranked playlist make your ranking increase when you win games, but in the social playlist you just gain exp. An example for the ranked playlist ranking: Team slayer is a ranked game type, if it is the first time you have played this game type, you will be ranked a 1 in that gametype. If you win a game in team slayer, your rank might go up to 2 or 3 depending on other people's rank in the game type. So if your highest skill is 5 and you become a 6 in team slayer, your highest skill will become 6. To become a captain, you will need a highest skill of 20 and 100 exp. Hope this helps!