Why does the crimson rector sword have a radiance rune slot in it?

[KT-1000]

Only scales with strength and doesn't have holy damage, most radiance runes(diamond) don't do anything for this weapon and the couple you could maybe slot in are also kinda redundant.

[Rain]

Regarding runes the devs really just rolled over the keyboard with their heads, most of the runes in weapons make no sense whatsoever and also are most of the runes just straight up worthless

[Yian Yan]

Theme, I guess. The Crimson Rector Sword is a sword belonging to a Hallowed Sentinel?

[Warbreaker]

Is kind if dumb yeah it was supposed to be the pure str sword in a way, which basically then makes the starting unga bunga long sword equal or slightly better because same scaling but triple str runes which will probably make it equal but lighter.