So you want me to find the proofs that X damage converted to physical damage ignores armor AND that physical doom bolt, AAR and devastation changes color to pee? Lurk around and google and you will find it.
It is arcane knowledge. How does a chicken know how to lay an egg? It just knows by virtue of being a chicken. How do pro GD 1337 players like us know that damage converted to phys ignores armor? We just know by virtue of being pro gamers.
Adding to what some people have said here, converted Physical damage ignoring armour is a relatively recent discovery. It was found out sometime last year after Forgotten Gods was released by the community I want to say?
Even years after the game’s released the community is still finding and discovering new mechanics to the game. No one expects you or anyone to know about this arcane knowledge intrinsically, the only way we players learn about it is from people running tests or modders looking into the game’s data as far as we can (as we don’t have access to the full source code of the game). and sharing information with each other.
I knew about it way before FG was out, by playing beronath death knight build. I miss those days, I think the game was at its peak. FG just added bloatedness and broken retaliation damage added to attack