Development of a Wizard hero from the Haven faction.

Regarding the inclination towards magic and the 30 mana bonus, especially in duels, it's actually better to upgrade mana absorption in duels. In the final battle on the bridge against the Sanctuary, this skill helped me win the battle with almost a single Seraph (one stack), as the enemy mage hero ran out of mana.
I appreciated logistics until it started making me lose. In Heroes of Might and Magic V, you had to spend 5-6 levels of upgrades on it, which significantly weakened the hero. This isn't about island maps and looting.
P.S.: Regardless, our mastery percentage (judging by previous posts) is practically the same, 157-166, so you can play with or without logistics. It's a matter of taste.
P.S.P.S.: If I'm wrong, and your mastery is above 180, let me know, and I'll upgrade logistics on the first campaign maps as well.