What are you talking about? The HKs don't have Abyss covenants. They have Deep Sea. That's what Harald had.
Gunko would obviously be the exception, since Imu is using her as a vessal, lol? When did any other GK get used as an Imcel vessal?
Anyway, Oda is literally just copying the scene of Luffy and Law against Doffy, and people here are still convincing themselves Imunko is going to be replaced by Shamrock or DR Loki as the main villain of the arc.....