The Human Castle is extremely well-balanced, and the tactics are straightforward, so there's not much to discuss. :)

In what sense are the tactics straightforward? The Human Castle is one of the few where building levels six and seven are not interconnected. Moreover, the optionality of building levels two and three provides a wide range of tactical options.
Of course, you can limit your own choices by playing exclusively with a 160% Valkyrie build on a patch with a level two building. Then, in every game, you'll upgrade archers on the first day and proceed according to schedule. But you can limit yourself in this way with any castle.
I think that the Castle is the one that offers a real choice of development – because the balance allows you to choose different paths.