crap load of questions pvp HELP!!!!!

Ok whoever helps me out here will get a huge tyyyyyyy ..

When does open wounds cap?

when does critical strike cap and is it the same as deadly strike and if it is do they add and does the critical strike from the barb skill(mastery axe) add too?

How can i calculate damage is there an equation?
Regenerate life work in pvp?does it add and when does it cap?

When does faster run walk cap?
when and items siads damge reduced by 15 does it work in pvp and does it add?

When an item saids -25% targets def does it work for pvp too?
How do i calculate ar?
How do i calculate as? and when does it cap for a barb and when does it bonus cap?

see lol crap load of questions thx for reading