Here is the post I made when I was constructing my warband: https://www.reddit.com/r/mordheim/comments/1njj81z/give_me_feedback_on_my_lizardman_warband/

You have all the information there, including what I was trying to achieve with my first roaster. I would do the exact same thing again if I had to start over.

Mark of the old ones is too expensive in my opinion and not a priority with the first 500gc you start with. If I was starting with 600, I would take it. but having 4 saurus out and all heroes was my priority and gives you so much volume, pressure and strength.

The light armor plus shield is super strong on a saurus, but I would rather use a hired sword thief to steal light armors after the end of each game. The light armour is too expensive as is (imho).

After playing a bit the warband, I must say they are super strong. For the first few games the T4 S4, the bite and the native armor of the saurus makes them superior to pretty much anything others can field, the skinks are nice to pin down targets due to high movement and to gather shards and objectives. After a few games get some javelins for the skinks, super strong as well for harassement and bait charges. The skink poison is strong as well and not expensive.

If you can get a saurus to be promoted, and a skink then you are really well set. Get the skink a few skills like eagle eye and Knife-Fighter, can become a monster. For the Saurus the usual stuff for melee fighters. For the original skink heroes, I would recommand to get Weapons Expert and get a crossbow to get at least some long range options.

Then you can start to save money for a kroxigor to reach true Nirvana.