Sacred Haven of Debauchery

Well, they are most likely evaluating the castle and the army as a whole.

Which isn't that bad. The only creatures you could call weak are the basilisks.

And for a casual observer, it's a dull, grayish-green zoo with just one weak archer.

The best archer at its level.*

with questionable melee creatures.

The best fifth-level creature and the fastest to obtain a sixth-level creature.*

What's easy to exploit? Starting with the Tower is already an advanced strategy.

Surround yourself with gnolls behind Vistan and play like some kind of Valkyrie.