Heroes 5.5 WarGame Edition - Tactical Edition.

Yeah, I solved the problem by calculating percentages as 20*3 + 10*3 + 2*4 + 2*1 = 100. Hmm... maybe this is actually better. Essentially, it differs from the previous version in how one "two" (2%) is broken down into units, with one of them being transferred to a previously discarded skill (education for Orcs, darkness for Elves, etc.).

Added 3 minutes later
I just noticed that Inferno and Dungeon both have Agrail and Railag – in my opinion, it's better to avoid this duplication, as they are essentially the same character.