Larian Studios Forums Divine Divinity (English) Help/Tips/Tricks What's the better armor?

I see a helmet with a defense of 40 and + 10 Vitality.
But I also have the option to purchase an helm with 70 defense...

How much HP reduction does each point of defense reduce? Trying to decide what's better for my Melee character

I just came up with another question as I was writing this post.
Hit Percentage, how exactly do you calculate your hit percentage?
I am assuming that's what offense stands for in Character stats.
Does it depend on the monster?

Is there a place for all the formulas? I am a stat *Whore* as they say.

Thank you for your help.