Wickleer put together a great analysis using Ruin as an example: http://www.arenajunk...ead.php?t=45323
Check out the Gladiator Bubble for More discussion on what people have found for their own BGs: http://www.arenajunk...splay.php?f=120
Unfortunately, without a season 3 hall of fame, this is the best information we have to work with. If you think for any reason that your Battlegroup needs to be adjusted, please post it here. If you have any further thoughts on how to improve the accuracy, please post that here as well.