>>95862117
I'd say do a blended red/orange for most of their armour and try get the fingerprint pattern on them somehow and save the bright yellows for the eyes.
Unfortunately, all the enemies that use Frenzy are typically in dull yellow robes (Midra/Cultists) or there's stuff like the witches. And Shabiri in the Ronin stuff is just normal greys/browns and the same goes for the fingerprint armour you can get.
I don't remember Vyke having much of a design aside from Invader Red.
If you wanted to, you could paint each marine in different warband liveries and then add a Yellow effect their their eyes (maybe have it streak down the helmet to the chest or get some effects/greenstuff to make it more pronounced).