Haven is a strange Castle =)

Two questionable upgrades: Militia and Marksmen.

Militia are better than Peasants in combat, and they have 6 HP instead of 3. But Peasants at least pay some money into the treasury =)

Archers can attack in an area, while Crossbowmen cannot. But Crossbowmen have a more powerful regular attack...

In my opinion, Haven is the only Castle that presents the player with a serious dilemma: whether to upgrade or not. I haven't encountered anything similar in other Castles (where an upgrade doesn't have abilities that the non-upgraded unit doesn't), only that some stats of the upgrade are worse. Rakshasas come to mind. Rani has 9 initiative, while Raja has 8. But Raja has Dash, which increases initiative by 100%. In general, the tactics in Heroes 5, in my opinion, are much more diverse than even in Heroes 3, at least because of the upgrades. Upgrades are always very interesting and give something new. Whether to upgrade or not now depends even more on the economic situation: if the conditions are very austere, you'll start to wonder about the point of spending on an upgrade (in Heroes 3, this usually only concerned me on levels 6-7, here - almost on every level!). In short, playing as Haven is very interesting, although I prefer the Academy in Heroes 5 to all other Castles.

P.S. I can't get enough of the music; it's amazing in Haven too!
P.P.S. OFF-TOPIC: I still can't understand why a Pit Lord kills any enemy with a normal attack, while Death has to make it a separate, serious undertaking: Harm Touch 8) I understand that this is a matter of balance, but why is it easier for the Pit Lord to send people to the afterlife than for Death herself?