It is unbalanced stupidly.
After several days of upgrading and trying everything I found a pre-patch video where he takes much more damage and deal much less.
Now for solo players he is almos unbeatable without cheesing.
Or spend an hour choping him for 40-50 damage through horde of respawning adds. Wich is far from being any kind fun.
If Mistlands is the same trash - it's better just drop it.