We brought the boss down to 50%, killed all the mobs and shamans that he summoned including orbs, but the beast kept healing and stayed at about 50% health.

We wasted 10s of ankhs only to abort the fight and leave the map.

Not funny, STS. Ankhs cost lots of gold or real money you know. I guess the 3rd map will have to wait for better gear because this is just too expensive and I don't want to see another bug when the hardest boss is at 10%.