It seems that if you die from a player attack, you do not lose that much stygma. BUT since the Maw is very mob populated, you tend to get last hit by mobs so you lose 20% each time.
- - - Updated - - -
I switched Horde because there is so much more people than in the Alliance making pug, guild and so on much easier.
My NB mage just works with the Alliance and the Horde and is neutral in their conflict.