Rereading those info boxes i cant help but draw the corellations twixt what we know of red mage and hellsguards.

We know that ilberd/raubahn uses one handed swords with fire enhancements, raubahn even using "ancient bladedancing techniques"
Its says in the encyclopedia that hellsguards are known for their sword and axe useages. Warriors dont use axes, red mages do. Ilberd/raubahn are both from ala mhigo and (what a coincidence) ala mhigo has a 10% helsguard population. Going further down the rabbit hole it also states hellsguard undergoing firewalking rites.

Its feels too perfect for the lorebook to mention hellsguard sword useage and ancient ala mhigan bladedancing