The tenth stage of the "Van Kanigem" tournament.

So, how many hit points did the tent heal?

I specifically leveled up to get the War Machines Expert skill. With this skill, the tent heals exactly 100 HP, and I already mentioned the resurrection above.
PS This was the deciding factor in defeating the beasts from the garrison, and, of course, the demons' ability. ;)

Added 1 minute ago

and then I took the tent!

The tent is given immediately :) when you reach level 2!

Added 2 minutes ago

By day 8, no computer will have time to build even a Stronghold, meaning there are no towers at all.

That's 100%, just like building level 5 units. Are there any differences? I'm asking for the future.