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The Stronghold is a pretty good Castle. Its advantages include a low price for units and good growth. This city is more convenient for playing for a quick victory, as development here takes place almost without problems. I consider the weak magic to be a disadvantage; besides that, I don't see anything that stands out. There are good heroes here – Battle Mages and Barbarians. For starters, I personally choose Dessa; she has Logistics, which is especially valuable at the beginning of the game. Then, I try to upgrade the birds during the first week, and then I follow a well-established scheme, building either Cyclops or Ogres, and then go into battle!
What difficulty level do you play on?
I don't quite agree with building Rocs in the first week... it's usually tight on money, and it slows down the economy a lot (except in cases where there is a rich territory and many weak guards).
Although, if the guards are weak, there is no problem defeating them with Goblins and Orcs (three Rocs won't make a difference)...
but spending an extra day and money...