Mafia: general discussions.

No percentages in the mafia!!! Never!!! I'm playing Heroes 4, going through the campaign as the Barbarian, and I'm so fed up with Minotaurs!!! Attacking with a double attack for three rounds, trying to take down a stack that could have been defeated with the first attack – what kind of happiness is that!

I've long suspected that the 15% chance of missing Minotaurs, as stated in the unit description, is inaccurate. 25-40% seems more realistic for them.

And I'm fed up with Archdevils in the Princess in Armor (and all her variants), killing half a stack with a 50% chance.

Oh, I dealt with them easily, using a Mage. First, I aimed for higher initiative. Second, I leveled up the Archmage. Third, I unlocked Archers. Fourth, I placed two traps. And that's it; even two stacks of these nasty creatures end up in the traps and are destroyed in melee combat by the beginning of their next turn. Of course, if the enemy units aren't too powerful.
As for Ghosts in Heroes 5, they have an interesting feature: they are missed exactly 50% of the time, but... There are patterns in their misses and hits that can be tracked and used to your advantage. So yes, randomness can sometimes be turned to your advantage. Sometimes...