[Spiney Norman]

Your girl friend is into daemonettes... lucky, I had enough trouble persuading mine to pick up wood elves lol.

I would not take an SSC against daemons, definitely not. They're daemons, they're not going to panic away, the only way to make them run will be by piling up the combat res.

I would take tomb guard, at least one decent sized unit, the str 4 T4 combination will be handy against the St3 daemonettes.

As for the rest of the army I would go for a construct army. You need units which can stay in combat and dish out damage turn after turn, so chariots probably aren't your best option, we're talking multiple Ushabti units and a bone giant.

Also, and this is the ONLY time you'll hear me say this, it might be time to consider the Icon bearer. A construct unit near an icon bearer takes two wounds less from combat than it otherwise would, thats pretty good, also the icon bearer adds a pt of CR to the unit he's in (say the tomb guard), and could be given a magic banner, which means your tomb guard could have both a warbanner and the BotUDL in, giving you a starting static CR of 7 for a large unit (3 ranks, banner, army banner, warbanner, outnumber).

You could probably make one chariot unit work, as long as you take lead with a prince, otherwise, for your core units, take archers, slaaneshi only have their basic ward, no armour, so you should be able to get something through.