Everyone is confused with the ranking system. If you drop from 5 tallys to four, you have to play 5 additional days to get it back to five. Its the same with four, if you drop from 4 to 3 you have to play another 4 days to get a tally not 1. And there is some exceptions though, some people might get a tally for doing nothing because the systen is quite glitchy. Finally, to increase your actual rank(at least to skull knife) just get 5 consistant 20 round games with similar or improved stats each game. i have not reached the highest rank yet. Rounds plays a key role in ranking up. I would use paragraphs but vita wont let me.