I´d be glad to help you!
but THIS will be a long one:
you have one big problem dude, you need more models if you want 4000pts.
atm you can make a decent 3k list.
first, playing a 4k game without a slann will be hard. though I´m sure it´s possible.
you have much saurus, skinks, TG and CoC i see.
Tg might be useless without a slann, but they sure work well.
since you dont have any chamo skinks, use most of your skinks as skirmishers to take out warmachines.
CoC are very expensive, but they can really pay of!
skink priests are nice, 3 of them are even better.
oldblood will be great as army general, and the BSB (scar-vet) is awesome!
put a skink with eotg on the stegadon.
so here´s a list that could help you:
LORDS- 161pts
Oldblood
Lt. armour, shield
HEROES- 648pts
2x skink priest
plaque of tepok
skink priest
plague of tepok
EOTG
scar-vet (BSB)
Lt. armour, shield
CORE- 894pts
30 saurus
full com.
26 saurus
spears
full com.
2x12 skink skirmish
javelins
SPECIAL- 1275pts
6 CoC
full com.
jaguar standard
10 CoC
full com.
jaguar standard
30 TG
full com.
totem of prophecy
that´s about 3k.
maybe buy another stegadon an some more saurus, that way you can get to 3500pts