The more games you play in a certain playlists makes you level slower in that playlist (EXP has nothing at all to do with the skill levels, it is purely coincidental) And I don't know why it needs to be said over and over and over and OVER again but the levels of your opponents matters alot. When you are level 47-49, you are almost always going up against LOWER skill leveled opponents so trueskill expects you to win so when you do win, it doesn't mean much, if anything to trueskill. To rank up faster, beat opponents who have higher skill levels then you. p.s best way to get similar skilled players is to use the "close skill" function in preferences.