How hard is League Play? And do you need your own party just to play or does it automatically set you up with random teams?
It's ridiculously easy, at least moshpit solo is anyway. I've played about 15 matches of it and I'd have to say my KD in it if I had to take a guess would be 5+, and I've also won about 11 of those matches.
So challenges don't count but your KD does? That seems wrong? You should focus on the objective especially in league since the win / loss is more important.
Anything to do with XP is limited, KD counts in every single mode, even party games. Vahn was talking about how it was impossible to set specific score requirements for streaks in individual game modes, so the same might be true for KD recording.