do they fall in the lava?
I spawned some of random color.
They do, because they don't have the complexity of the new AI zombies & skeletons have.
Either way, I decided to give some of them wood, bad idea.
However the battlefield looks more... active.

Second-hand story:
WHAT THE forget IS THAT CREEPER DOING UP THERE?Also, gonna start and gonna give each team (each team except grey will be 80 soldiers) 10 gunpowder, which makes them explode, I will post results at the end.

Edit: They don't really have much activity:
http://prntscr.com/7xjps