Tactics for the Stronghold.

The part about wolves in the utopias made me smile :) question: for what purpose do you even take them there? They don't possess any hit power, and they simply won't have time to demonstrate a lethal attack; hence the conclusion that they shouldn't be taken to the utopias. As Dirty absolutely correctly said, you should take "fat" stacks like ogres etc. to the utopias, and in order to reduce losses of your own army, it would be good to take units from other castles as fodder; for example, these would work very well: dwarves and elves from Rampart, demons from Inferno, swordsmen from Castle, etc.
as well as golems, earth elementals, basilisks, and others. That is, they need to be fairly "meaty" and inexpensive troops (ogres, elves, and golems), which, due to their insignificant speed, cannot be used anywhere else—only to be exchanged for gold and artifacts in the Dragon Utopia and for angels in conservatories. And besides a distraction for the dragons, you need 1-2 squads that will actually destroy those dragons. For this purpose, bears are very well suited, while orcs are not at all. Therefore, put bears in the first line, and orcs wherever they fit. Bears are stronger for most tasks and faster as well.