i use chaos slaanesh and im goin up against lizardmen with a lvl 2 slaan i just want to know the best way to kill it

heres wat i got

lord of chaos on steed of slaanesh
aspiring champ
sorceror lvl 2
bray shaman lvl 2
20 warriors shields
16 warriors additional hand weapons and chosen
16 marauders flails
5 marauder horsemen throwing axes
5 knights chosen
12 warhounds
2 fiends of slaanesh