The strongest castle in Heroes of Might and Magic IV.

Those are wise words! And we've already had disagreements about the front lines. I would arrange them like this in the rear: halflings, djinn, mages
on the front lines: hero, dwarves, titans
And still, everyone who can shoot should be a ranged attacker. And Haven also attacks with magic. That's a big advantage.
Regarding Life and its prospects. That's undeniable. I'm not arguing, but I'm setting my own priorities.

Here! The hero is on the front lines. He'll be killed immediately :) And the Haven mage should be protected. A well-developed general for Life gives the right to the first move for my army. Therefore, I can do a lot: kill your hero twice (if he has immortality), cast "Greater Shield of Order," "Bless," "Heavenly Armor," etc. But most importantly, cast "Guardian Angel" on the Angels :) The outcome of the battle can be predicted :)