The daemon lore of slaanesh is probably not worth investing too much in unless you are building a ld-bomb army. IMO, if you really want to take the keeper, talk your buddies into playing a storm of magic game. GDs on fulcrums are awesome
For the LoC, keep the basic daemon Lore of Tz. Lots of nice damage spells, the awesome glean and boon all at bargain basement 7th ed casting prices.