This ****ing dog is annoying as hell, but he's a ****ing dragon killer. Once i realized he's immortal until i complete the quest, i decided to rematch with that Ancient Dragon that was kicking my ass earlier this week.
It worked. I switched to dual fire bolts (so i didn't end up killing my helper this time) and let the dog tank for me while i blasted from a distance. Got him in the first try. And while killing this dragon, i noticed one flying around way up on the peak of another mountain. I moved up there and bam, Ancient Dragon. Same game with the firebolts and the dog tanking. 1st try and took him down easily.
If ONLY this dog wasn't so ****ing annoying i'd just keep him around. He keeps walking into me and blocking me when i'm trying to do shit. If i stand in one spot, he'll come over and plow into me, every ****ing time.