How to choose the right Fury skills? (King's Bounty: Dark Side)

I just discovered the game, level 23, and I'm replaying - does it develop randomly, like in Heroes? And what are all the possible options? In the second playthrough, the optimization of the orc came across, now the blow hits 700 and costs 12 Rage for only 10 lvl, and sometimes a blizzard gives unnecessary. Can you please tell me where and how you can get acquainted? Google rummaged through the whole ... Thanks in advance!