I ran away shortly after, yet again using shadow walk. I ended up on the roof of a close-by building and started following them.
Suddenly explosion shook the ground. A fireball struck the ruin I just moved from. Debris shoot everywhere, but it was not the end. More explosions just decimated that piece of architecture, throwing smoking and burning pieces into the sky.
I clearly managed to piss off the mages. It actually brought a smile to my face. Our plan was working.
While tailing my friends I tried to scan through the horde of orcs, to find where, or if, the boss was hiding among them, but because of the distance and thick black smoke obscuring my view, it was simply impossible.
I gave up on that, and jumped down, as more fireballs went flying my way. We stopped after a solid minute of sprinting.