Kills per Minute (# of kills divided by time since map started)
Kill Streak (# of kills before being killed)
% of Total Kills (total individual kills divided by total kills of the entire team)
For kills per minute (KPM) to be accurate, we'll need to explicitly know when the game begins and ends, and maybe even when the player becomes a warrior (KPM may be most interesting when it's calculated only during the time that a player is a warrior)
Everything else can be derived from the limited set of stats (i.e. only player kills and game start).
Kills per Minute (# of kills divided by time since map started) Kill Streak (# of kills before being killed) % of Total Kills (total individual kills divided by total kills of the entire team)