Tactics for the Stronghold.

By the way, there might be some rational basis for the strategy of building an outpost for the Barbarians – since their army constantly suffers defeats from the armies of other states, perhaps it makes sense to supplement it with units from captured castles?
Of course, this is expensive, but the Citadel is very cheap in terms of unit cost and construction... and with the rapid map control using the "Dess" spell, can this factor be used to achieve victory?
What do you think...