How does Armor/Ward/Focus work?

[MeiLan]

So i was taking a look at how some of the game mechanics work and i've noticed this update on the 0.2.30 Patch Notes


I have two questions. Is there a more detailed breakdown on these mechanics?

If not, then is it safe to assume that, for example [Mirror Stance] which has a displayed bonus of +10 Armor, Focus and Ward provide a +5% damage reduction respectively?

 

[The Observer]

The exact formula is final damage = initial damage * 100/(100+defensive stat)

Roughly speaking, every 100 points of armor increases your effective hp by another bar.

 

[MeiLan]

Thanks, this clears things up a lot.