Why is it weaker? In the final stage, you mean? In many maps, nature is actually dominant because you can clear the map quickly. Haven starts slowly, and Necropolis starts a bit faster.
In Equilibris, after level 20, there don't seem to be any problems with this, but in Vortexes...
In Equilibris, you can achieve 100%, and in general, the Grand Magus resurrects 55%, but 2 out of 2, and the Cardinal with the Grand Magus 3 out of 3. 100% will be achieved by the Cardinal with the Cross and the Staff of Reinan. Of course, you'll have to try, but...

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!