They will go en-masse with their troops so the odds are that you are going to get stuck in combat fairly quickly.
Saurus excell at close combat so that's not such a problem, the problem comes when you start getting flanked and outnumbered.
In a 1000 point game, magic will not play a big role so I propose the complete opposite to the above post (sorry Pika). Don't spread your strengths, focus them, go for total close combat dominance.
Buff out 2 saurus squads with spears. Take 2 scar vets if possible, a cold one mount will help as the fear causing will be an added bonus however it is not vital.
A good idea would be some cold one cavalry, slam into those wide flanks of gobbo's and tear them up.
However, a golden egg in games against O&G, IMO, is their low leadership. Salamanders are a blessing here. Their ability to induce panic is a wondeful way of clearing out massive units of gobbo's that, while not being a direct threat to your units in terms of combat prowess, will bog units down and can be used to begate rank bonuses by flanking, or pinning while another unit flanks.
So to cap off, a strong CC core, salamanders are a must, scar vets if possible, and any remaining points, throw into units to skink skirmishers that can be used to draw out any fanatics, threaten flanks, pepper the enemy with their poison and just generally get in your opponents way.
-Eagle-