Jaime Lannisters Gold Hand

Hi everyone, I was wondering who Red Priestess was and how old was she. Was lord of light misleading her with Stains visions, or was she complete fraud looking into prophecy and trying to make sense of it herself, without any divine guidance?

As far to my best knowledge chainmail will not be efficient against piercing and stabbing. Boiled leather adding protection but again if it was effective enough against that kind of attacks, no one would create a plate or segment armors. If they attacked him with small short blades maybe but I guess it was daggers, something closer in length to Bowie knife or WW2 bayonets. I don't think it could give him protection against that attack to prevent serious penetration.