The question is as follows. If Gnolls attack Zombies, and the hero has an attack of 5 and the Attack Expertise skill, then with a damage of 2-3 for the Gnoll (let's take the minimum value = 2), the total damage will be 2 + 0.03 + 0.3 = 2.6.

1. The attack value itself is not important, but rather the difference between the attacker's attack and the target's defense. There is a 5% bonus for each point of advantage.
2. Attack Expertise provides an additional 30% of the base damage, i.e., 2 * 0.3 = 0.60.

Therefore, the question is - how did you calculate it? What does "2 + 0.03 + 0.3 = 2.6" mean?

2Monza: Are you sure that the starting MP for Heroes is always the same?

I also checked - indeed - it gives 1630 MP, which means that its maximum is determined. The minimum needs to be tested.

2AmberSoler: You can also add information about the clover field (no +2 bonus for neutral creatures without a Hero).

Who are you referring to as "neutral creatures"? ;) The bonus only applies to units from neutral cities (Fortress, Conflux, Stronghold). No other units receive it.

to AmberSoler:
I mean Dendroids.

Check it yourself again. Vampires can easily replenish their health by attacking Dendroids.

There are two questions:
1. Do Master Gremlins have a penalty in melee combat?
2. Do the spells Force Field and Wall of Fire, as well as stones, logs, and puddles, create obstacles on the battlefield that impose a penalty for ranged attackers?

1. Yes. There is a penalty. (Fanatics, Mages/Archmages, Observers/Evil Eyes, Titans, Medusas/Queen Medusas do not have a penalty).
2. No, if the distance to the target is 10 hexes or less in a straight line, then the penalty does not apply. Regardless of obstacles.