Psyringe: You're certainly gravitating towards teams that are slow starters. ;)
Chaos and Nurgle often rule their leagues when the teams have high team values (2000+), but as rookie teams they aren't that competitive. They can't do much with the ball, but they also lack the skills for effective clobbering. Which also means that they won't earn a lot of skill points in the beginning. They are a bit like 20 ton trucks with their first two gears removed: Really hard to get going, but also really hard to stop once they do.
JudasIscariot: Well, I figure the only I'll properly learn BB is through the school of hard knocks. Sort of like if I used the Violent setting during team training :D I figure if I can build an effective Chaos team or maybe Nurgle then I can build any team :)
Still, I know my one weakness is positioning especially when I have to place my guys first and I have no idea what the other player will do.
2 main schools of thought:
1) Make sure that there are no gaps for the other guy to run through without having to either knock you down or dodge.
Basically, cover the width of the pitch with TZs.
Mainly used against fast week teams.
2) Defend in depth.
This will leave gaps, usually along the sidelines.
You have guys further back to catch those that run for it, potentially surfing them if they do stick to the sidelines.
Mainly used against stronger teams as it gives more chances to delay the cage.