I would drop the champions from your units as they are a lot of points for not much benefit, and drop the skink chief
BSB...He is very fragile for a
BSB. Just make your slann the
BSB and with lore of light (which is excellent here in this list

) you are already gonna hang out within 12" of all your troops so they would retain the benefits of your general and
BSB in the middle. The extra points should allow you to get another scar-vet to join either your big block of saurus or your cold one cav. Armor of Destiny is awesome here as its heavy armor and gives you a 4+ward save, and on your scar vet now I would drop the current items and give him the talisman of preservation. Now you have two characters with 4 attacks
st 7, and if you whiff then you still have a 4+ in the event of people rolling lucky against you, or killing blows or high
str attacks that bypass all your armor.