So: Gwok Jing (end of ROCH), Yeung Gor (same), and Cheung Mo Gei (end of HSDS) challenge Dook Goo Kau Bai at the peak of his power (Formless Stage).
Gwok Jing is armed with the Dragon Sabre. Yeung Gor is armed with the Heavy Iron Sword (pretend that it wasn't melted to be reforged as the Heaven Sword and Dragon Sabre). Cheung Mo Gei is armed with the Heaven Sword.
Dook Goo Kau Bai, naturally, is unarmed.
What is the expected outcome of this encounter?