Battlefield size in Heroes 5.

The main point in the ratio of map size and unit speed is whether a unit can reach the opposite end of the map in 1 turn, i.e., whether it can attack on the first turn, at least the unit standing opposite. There should be few such units. IMHO, only Archangels, Archdevils, Black Dragons, and Golden Dragons, plus, due to the legendary agility characteristic of elves, Wardancer and Blood Fury could have this ability. All other fast units, such as Paladins, Nightmares, Raiders, and Djinns, should be 1-2 squares short, and slower units, such as Hydras, Treants, or Rakshasas, should cross the map in 2 turns before the units standing opposite.