Heroes 5.5 WarGame Edition - Tactical Edition.

But you're not taking into account that it takes you a whole 3 days out of the first week to fully build the capitol. That is, both the first and second weeks will suffer significantly in terms of troop production.

Moreover, the capitol is useless in the first week. In WGE, building up to the capitol will cost 1000 (town hall) + 3000 (magistrate) + 6000 (capitol). This means that the capitol will only pay for itself 3 days after construction. That is, only on the 9th day (no earlier than the second week) will the capitol start to generate a real profit. For the entire first week, you will be in the red, even compared to building without a town hall and magistrate in the first week. Building a capitol means hoping not to die from an early rush in the first week and somehow survive with small troops in the second week. If you're going to build a capitol, it's often more profitable to do it on the 8th day (start of the second week) than on the 5th. With an early capitol, the gain is only +6 thousand compared to a late one, but for the extra day of construction in the first week, you can easily build additional creatures of comparable value (for example, what's better - 6 thousand or the ability to hire an extra dragon in your army?).

P.S. Why does the hydra have a growth rate of 1-2 instead of 2-3? Do you want to make it a top-tier creature of Tier 6? Isn't that too much for the faction to have both Tier 7 and Tier 6 top-tier creatures?

And why not? The elves and dwarves have the same situation with these tiers. In general, the hydra is a unit worthy of Tier 7 (as it was in previous games).