Heroes 5.5 WarGame Edition - Tactical Edition.

This is already 2 options against one. And I would like to see this perk (readiness) being used more often than usual. But usually, it is never taken.

I will repeat once again:
The variability from competing perks is much stronger than the variability of "anything goes." Because this forces you to think more carefully about how you develop your character.
You take one, and you lose the other.
And with your approach, it turns out: you take one, but you'll think about the second one later.
This is a very simple choice. The game is not just about different combinations.
In this case, the combinations will only win in single-player, but the mod is for multiplayer ;)

Otherwise: When we thoughtfully choose a branch, we already lose the 3rd-level perks in the second one. This is the sacrifice of our choice.
At level 3, the choice of perks is also not easy: by taking one, we lose the other.
The strength in this case lies in the player's choice, not in the game's design.

Added 5 minutes later
There is no alternative; you can either upgrade the tent or the ballista. Rune machines will enhance both.