Orcs need to rework random skills

Hello, it seems like orc very unstable race. We have worst orb in a game. One of most useful strategies where BM first hero also have same problem (becouse crits also random). I think in game we have many things with random like damage, items etc. So it will be great to rework orb and BM crits, for example it can work by every 5 or 4 hit.