Hmm, I might have to try that, AGAIN. Also, one of my dilemmas are NPC vs NPC fights: up until now the PCs are in the sidelines, and they have a reason to be. However, they cannot be involved or see every single one - plot wise, it would be really lame. So, either PCs get to be spectators to nearly all NPC vs NPC epic fights like Grinnoc vs Rivain at his full power (spoiler - he currently has access to only ~10% of his power). Or Grinnoc vs The First/Luminesca/Oberat/Celestine/anything really.
Or they can happen in the background, but... that's no fun.