and indeed - the overall style is not consistent
I already suggested abandoning the red color - I will suggest it again, the alt-gray can be set to the one that will have gray tones (closer to black), and the grade can be made in blue tones
Now about the dragons, the dark gray grade reminds me more of a twilight dragon, it would be better to make a dark blue dragon for the black guard
Added 6 minutes later

I will base the mage's design on this, the assassins will wear gray hoods, and the archers and swordsmen will be without distinguishing elements.