Question about physical vs magic damage

Hi,
I’m back to playing retail (RIP SoD). I need some information about how much physical/magic damage does specs do. Trying to figure out when to use Blessing of Protection vs Blessing of Spellwarding. Something like arms is 100% phy, enhance 75% phy/25% magic, frost dk is 50%/50% etc. Thanks in advance.

Use details, click the guys name in details, then hover over the icon of the abilities, it will say whether it’s physical/shadow/frost etc.

I would say retri do magic dmg and you could play magic bop vs them, any amount of % I doubt anyone are willing to give you as that would take alot effort needlessly to give exact amounts of % when you could just use magic bop vs retri and rest that do magic dmg.