Have a look at this guide
https://warhammer40k.fandom.com/f/p/3311266298855986403.
This is of more use for the colours than anything else for the type of pack that you are painting. What you actually use is up to you, Runes, Swirls, Fangs, Wolves, Skulls... as long as the markings are the same across the squad you are cool!