There is no such thing as killwhoring. Killing someone from behind is actually useful, ecpecially if that enemy player is a shielder or even worse, hoplite. Doing that you save precious time for your team so they can again look behind them for backstabing cavalry or ranged.
Nothing worse than seing 10 teammates desperately trying to kill KingGylpe by attacking frontally...
That's why I avoid teammates most of the time, they simple aren't useful at all and that's because in current state of cRPG where everyone is backpedaling helicopter it's actually easier to kill a player one on one than ganking him with your teammates.
Unless you're abusing pikes...