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By the way, where exactly did you encounter the difficulty? The interface is very user-friendly – a special thanks to Stetnoel!
The difficulty lies in not understanding how to properly balance the growth using the calculator. I still consider the creatures more as independent units rather than neutral ones, but as a separate Castle.
I am interested in coming up with a cool race that will fit within the balance. I repeat, this is just a concept; I am not a modeler, I am a writer. And if someone decides to create the creatures I suggested, that is their right.
Added 1 hour 21 minutes ago
Creatures of the Coastal Tribes faction. Preview.
First level

First level

Slaves
During numerous battles, many orcs fall into the hands of the coastal tribes. After being captured, they have no choice but to become slaves or be chained to a pole in the center of the barbarian settlement as a laughingstock. Most choose the former. The orcs weaken from the terrible working conditions and meager food, but they still often die in battles when the settlements send them ahead of other units. Waving their rusty chains, they fight with enemies until it becomes clear that their masters are losing the battle – then the slaves have nothing left to do but switch sides.
Rebels
Not all slaves endure the abuse of their masters until the first lost battle. Some unite to fight back against their masters. Not being driven by spears in the back, they try to avoid large-scale battles, and when they lose, they often switch to the side of their enemy. However, they are masters of surprise attacks from ambushes, when the opponent is unable to respond to their underhanded strike.
Miners
The strongest of the slaves are sent to mine ore at the foot of the mountains, where the hatred towards them is not so strong, and they are rewarded with good rations for their work. Not wanting to change a comfortable life for uncertain prospects, they do everything they can to protect their masters from enemies, fighting even more fiercely with each slain ally.
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Second level

Hunters
Almost all men of the coastal tribes become warriors or shamans, and the fate of hunters falls to the women. But despite their gender, the hunters of the coastal tribes are famous for their exceptional accuracy – it is said that they are capable of shooting arrows into the eye of a boar while standing with their eyes closed and relying only on sound.
Scouts
Some of the hunters go to the steppes to learn the art of survival in the most terrible conditions. Returning after a few years, they become completely different people – strong warriors, immune to any poison, and excellent hunters, bringing twice as much game from the hunt.
Bear Hunters
Hunters from the mountain ranges are famous for their impeccable shooting, because hunting thick-skinned mountain bears does not give a chance to miss. Approaching the opponent as closely as possible, bear hunters deliver a single, devastating blow, piercing the weakest point in the bear's hide. Their skills are valued both on the front lines and in defense.
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Third level


Wolf Riders
Not finding common ground with many peoples of the steppes, the people found loyal allies in the steppe wolves. Large animals are capable of supporting the weight of a lightly armed hunter, and sometimes they even join the battle, supporting other units of the coastal tribes' army.
Lancers
The strongest of the wolves are specially trained to carry heavy fighters and strong armor. Despite the loss of speed, it is quite difficult to kill one lancer, and a large group of them turns into a steel avalanche, sweeping away everything in its path.
Raiders
Wolves at the foot of the mountains are less aggressive than steppe wolves, but much more agile and resilient. Their riders are respected, because while the enemy strikes once, the raider is capable of inflicting two, or even three, deadly blows.
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Fourth level


Wild Griffins
Numerous cliffs and rocks along the coast are inhabited by wild species of griffins. They did not submit to the orcs, but for some reason, people turned out to be closer to them – and they became their loyal companions. Usually, ordinary griffins are busy hunting for food, but even in battle, they can show what they are capable of, maiming enemies with powerful blows.
Night Griffins
In the steppes, the hunt begins at night. At this time, the most terrible creatures crawl out of all the cracks, and many griffins die in unequal battles. However, those who survive demonstrate excellent camouflage skills – and fly so silently that many enemies do not even notice the approaching death.
Cliff Guardian
The oldest and most experienced griffins guard their nests from attacks by various marauders. Soaring into the clouds, they swoop down on the enemy, crushing and throwing him into utter horror.
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Fifth level


Ogre-Shaman
Those who result from the fusion of orc and human blood are called ogres. These are creatures that possess an incredible predisposition to magic, and many shamans undergo a special ritual to become an ogre. Ogre shamans are not only good mages, but also excellent fighters, combining the best qualities of humans and orcs.
Ogre-Mage
Some of the ogres, even as humans, were perfectly skilled in magic, and after the infusion of foreign blood, their powers increase many times over. Ogre-mages can turn the tide of battle in favor of their army with a single wave of their hand, strengthening allies or weakening enemies.
Blood Shaman
Orc blood helps not only mages, but also warriors. An ogre warrior is capable of not only casting auxiliary spells, but also fighting on the front lines, withstanding the most terrible blows and inflicting no less terrible attacks.
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Seventh level


Troll
Trolls lived in the mountains and ravines of the coast, often destroying human and dwarven cities. It is hard to believe that people were able to tame these terrible creatures, and this is largely due to the shamans, who appeased the evil creatures. Their powerful blows shake the earth, and their tough skin can withstand the most powerful hit. However, they are very vulnerable to light, which often turns them to stone.
Jötunn
Jötunns are the oldest and largest trolls, who have probably lived since the beginning of time. There is little left of a living creature in them; almost everything in them is pure stone. Possessing an amazing connection with the earth, they are capable of launching an attack with its very energy.
Mountain Trolls
Mountain trolls are the youngest trolls. Hot blood boils in their veins, and, falling into a combat frenzy, they are capable of shaking the earth so much that the walls and towers of cities around them begin to crumble, opening the way for foot soldiers.