Quote Originally Posted by CN the Logos View Post
Now I haven't got the rulebook on me, but I believe that means my dream of of a small allied force consisting of a Lord/Sorcerer and a few Plague Marines is dead.
Well, if you take a Lord (not a Sorcerer, that doesn't work), and two small squads of Plague Marines, that does satisfy the Primary. Then you'll just have to max out on whatever Necrons you've got left. It looks wonky on the table, but on paper it's legit.

So... now what? Is there any way to make regular Chaos Marines useful to me, or should I just set them aside until I can afford to make them into an actual army rather than an allied force?
Useful to Necrons? Not really. You can get a Mastery Level 3 Sorcerer with Telepathy. Which brings a better Deny the Witch roll which Necrons don't even have. Then, if it was me, I'd grab a minimum unit or two of Chaos Marines and stick a Flamer in just for Overwatch stuff.

Then from there; Mark of Tzeentch with Icon of Flame. Or, since it's just supposed to be a minimum-man Scoring unit, the Icon of Vengeance works too.
Minimum Chosen with Plasmaguns to bring valuable ranged AP2 which Necrons don't have. Make these guys Slaanesh and give them FNP Icon. But, you could have Plague Marines too who have less Plasmaguns, cost more points and have extra Toughness. But they don't Score so you don't really need them to survive after they've done what you want them to...Which I don't know what that is.

Fast Attack; Slaanesh Bikers with FNP. Easy.
Heavy; Flakk Havocs, but you wont need to pay points for Flakk since you're Necrons and you've already got 4 Flyers of your own...Right?