Tactics for the Swamp (Fortress).

I'd like to hear the opinion of experienced players:smile43:
Here's a situation from a game with the Swamp Castle, SOD, first week of development:
By day 2-3, I have 3-4 heroes. And looking at the open territory, I see that Hydras are being built in the Fortress, right at the limit. The question is: should I limit myself to this number of heroes and sacrifice the pace of development, or buy more units, risking not being able to reach level 7.
Let's assume there are factors indicating potential problems with this: slow roads, poor resource spawns, etc.

In my opinion, it's impossible to assess on day 2-3 that Hydras are only being built in the Fortress! Based on what parameters? The loot in chests and crypts is much better in terms of level, for example. You need to take heroes and break through to neighboring resource spawns. You can immediately buy and defeat a built Hydra (a maxed-out crypt and a 15th-level Gnomish Workings can be taken by a level 1 mage without mana and without any tricks).
In SOD, there's basically no one to fight with without Hydras. Hydras are definitely the way to go. 2 Hydras are already a force, but 6 Geese are not. It's too early to upgrade Cows. There's not enough gold. Lizards are useless without the "Wisdom" skill. Practice shows that if you don't build them on day 1, you won't build them on day 2 either (either you don't need them or you don't have the money)