On Warrior difficulty, some things work differently. Giovanni is apparently afraid of border guards and arrives later than the blue player, while the opposite is true for the hero. Wessel uses antimagic instead of vampirism also because of the difficulty level. He has a simplified combat script there. And almost all variables depend on the difficulty level, including Bertrand's army.
And that's right. Otherwise, what's the point of having difficulty levels at all?
Thank you for the Walkthrough and the pain)
You're welcome ^_^ This is the pain of a casual player who has not played much besides the original Campaigns and your scenarios. Someone like Remix would find it funny to read 
Of course, deep down I'm a bit of a sadist, but who is without sin?
I confess, I am also guilty; I lied – my penchant for masochism developed during the playthrough of the infamous "add-on" "Volkodav" 
I wish you inspiration and strength for a new scenario/scenarios!
P.S. Yes, I completely forgot. I think the "Bundle of Wood" didn't work properly for me. The game didn't let me put it in a slot. I got it, as far as I remember, by killing another hero.