magma armor morph question (corrosive armor)

wizardpsx

it says while active your attacks ignore armor.

how does armor in this game work? i have a few questions below

1) does more armor reduce incoming damage from phyiscal
2) does more armor reduce incoming damage from magical/elements
3) does more armor reduce incoming damage from posion
4) still spell says attacks, does that mean only light/heavy attacks or also skills?
5) does this affect spells?

im making my own build of mostly dk healer, (main dmg is class skills and restro/destro staff). i was wondering if i cast corrosive armor, will my staff attacks hit harder? and would my spells that do fire damage hit harder? or is it spells that deal phsical damage like talons and stonefirst? or does it only affect stamina based weapon damage?

Lynx7386

Yes
No
No
Both
Yes, if physical