The occultist is a totally legit character but the two soldiers are not. The one with 15k hp is wearing my cheat-ring that gives 10k hp and some ridiculous amount of damage. I it use when I just want to run through the world and test certain things. Both him and 5k dude are artificially leveled and they may even have additional skill / attribute points for their level. They’re basically just junk test-characters that I pulled out to show off some higher level gear because I didn’t have a real soldier that high level.
I think the highest I’ve played with a legit character was to around 25 and that was a long time ago. They kept becoming invalid as we made changes to the game or I changed around the skill trees. That and, of course, it is a big time investment to keep leveling characters. I play legit when I really want to accurately test overall balance / feel but when I’m just looking to test out higher level skills or some other thing, I cheat up test-characters.
Without the ring, Drinkn Lincoln only has a little over 3500hp. By that level it would probably be possible for a pure soldier to get around 6-8k if they went for all our +life, +% life affixes, dumped a lot of points into physique and maxed out the soldier military conditioning skill.
By that level enemies can dish out a lot of damage too though and you need higher hp if you’re going melee.