Leopold Magnus and Diamond Corps
Darkspace Iron Chef
Diamondback and M8-Blitz Auto-Tank
Sophia Drake and Black Dragons
The time savings was mostly due the grey color scheme of Black Diamond which allowed me to prime and quickly highlight most of the models, with minimal need for fine detail, or the strong contrast in colors that I usually go for. It also provides some incentive to choose similar approaches for other projects. For example, I've considering different Space Marine chapters, and the Space Sharks ("Carcharodons Astra") have a simple gray color scheme that would work well with the same approach.