They get devuces same synergy with Parry saves and the Mark of Tzeentch as Warriors, so rank them them aperture 2 backup
fairly deep for steadfast and use them to hold something nasty in place while the rest of your army sets up etherbet flank charge. If you like models who look like they come from the era before detailed casting, buy marauders. If not, buy the better-in-every-way Chaos Warriors. Alternate take: The strength marauders bring to the table is the fact that they bring a big block of troops for cheap points or if you read above you will notice chaos maruader with mark of khorne and flail is 10 points when playing WoC. Also, buff these bastards with some spells, and they can become a other devices ethernet controller pain in the ass. Their main downsides are: 1) they are mounted on 25mm bases, so a horde of them will be hard to manouver, and 2) they need support from characters. Marks though can be quite effective on them, Mark of Nurgle helps them survive a lot longer in combat (good for other devices ethernet controller, Mark of Khorne makes them pretty good against other core if they have Great Weapons, and Mark of Slaanesh allows them to ignore the inevitable panic tests that come from being shot at.