My wife is interested in starting the hobby and OF COURSE she has to counter me and go all in with Chaos (like I did with the God Emperor). She's settled on CSM but what's the best loadout to go with? I think she's leaning Slaaneshi/Khorne-esque marines. I know next to nothing about the Chaos SM's other than to kill them with lots of Meltas....

Any and all help would be appreciated.