Black Ops 2 I run two accounts warmup only at 1.97kdr...real is at 3.77. i'm in master division 4 league play. pm 4 clan inv...must have 2.5 kdr or better
Doubles is the fastest, but if you are playing legit it can be hard say from level 48-50. TS is probably the easiest, but SWAT is pretty easy too. Lone Wolves can have some really bad people at high ranks (even 50s), but at the same time most of the people playing it now are pretty good from what I hear. MLG is the hardest of the ones you listed as it takes teamwork and tends to have the best players who have gotten 50s in other playlists going in together.