There was only one moment where I couldn't save the ancient one because I couldn't reach the demons in time. :)
There's a small bug :) You can save him if you get close enough to them; a script will trigger. But there will be a ton of monsters there. I'll fix it in the final version, because it's really unclear.
By the way, has anyone completed the labyrinth on the Stinking Swamps map? I'm just curious.