Wicked Black/White/Grays



I love Wicked and Wicked Detail paints by Createx so I recently bought some that I didnt have before:
Wicked Black
Wicked Detail Black
Wicked Detail Smoke Black
Wicked Detail Paynes Gray
Wicked Gray

Might seem absurd to buy 5 bottles without getting any color, haha. But I like the vastly broadened palette it opened up when working in black white and gray (which I mostly do).
Looking for some thoughts and/or insight on using these colors. Any advice would be much appreciated. Any helpful hints, Do's, Don'ts any kind of experience using these colors/shades. Thank you much