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Regarding the upgrade of Trogs... Usually, there is a point to it, but you always need to assess based on the layout. If I encounter easy blocks in the first few days, there will be no upgrade - let's calculate how much money it requires: 1000 for construction, 750 for every 50 Trogs, totaling 3k on average. That's a guaranteed unpurchased hero, not to mention the loss of building tempo. And if there are no Harpies, it's a total bust. For me, upgrading Trogs is 100% justified only if I see 2-3 Dwarf Cottages near the Castle or many blocks with speed 6. As for the thought process in the game - there's no point in touching the Water Elementals right away; let's level up the main hero first, it'll be easier later. The blocks are easy (Pokemons, Dwarves, Devils - laughable), day three: the entire respawn is in plain sight, the plan is simple and clear - go all out, but the Minotaurs with the Portal and the buyback must be in place, and resources are just enough for that (on day 3, it's still not too late to upgrade Trogs if needed, for example, to break through Elves, but in that game, there were no prerequisites on the respawn for an upgrade). I thought about upgrading the Trogs, I won't lie, because there were few of them and it would have been quite useful in that case, but I decided to hold off and am very glad I did - otherwise I would've thrown 3k to the wind and goodbye to the striking stack of Minos.