Sorry, I was busy IRL.
So, it takes me a couple of days to beat this level without all this stuff: emperors gloves, viking helmet, invisibility. Interesting, but pretty hard for me)
First, I tried to find health balance. If hero is weak, he can’t survive for the whole quest time. After all, I think the more health you have at the start, the more chances to pass the level you have. With 2850 hp at the start, hero has 160 hp in the end (actaully 12 hp for the first time as i forget to except "sand-yak" from targets).
Then, you need tactics. I’d recommend to stop enemy hero, kill some archers, eleminate shaman, kill the rest of archers, retrieve back.
As for code (Python) I used len(archers) as condition to determine target.
Tricks: “bash”+“bear-trap” to stop enemy hero.
These advices are hints, not the straight instructions. There are many ways to complete the level I think. Hope you’ll find your one.
Good luck!