I thought I'd let you know how it all went....I played the list I originally posted....
It was an intense game, we played a Dawn attack, I went first and had my army all over the place; lord with saurus on the right flank, terradons and Tetto's unit in middle with my dinos coming in on the left while my opponent playing all tzeench demons got to choose 80% of his army deployment & rolled a 6 to go first.
I only rolled 1 for Tetto's vanguard so I was really on the back foot from the start. In the first few turns I was tryng to get myself into a stable possition while he got my saurus unit flanked in the rear with flyers and charged head on with some kind of monstrous cavelry. Thankfully and I don;t know how (seriously lucky rolls) I cleared the rear chargers on the second round of combat and got his cavelry sorted on the third. Leaving my remaining 10 saurus to traverse most of the board to join the remaining fight.
on the other side of the board we had a bit of a stand off between his monster (Deamon with the canon on it's back) and my steg & bastilodon. I fired everything at it; Terradons dropped rocks and all spells, which on 6's to wound everything took ages. It eventually got the charge on the steg and a long 3 turn battle took place until I evenually killed it. The steg and bastilon then covered the remaining ground to hit his 2 units of horrors, the bastilodon didn't make it. However the steg did.
in the remaining part of the battle, his magic eventually wittled down Tetto's unit (Damn infernal gateway) and killed him off - he did pretty much nothing in the entire battle thanks to some rediculously rubish winds of magic rolls and the deamons amazing dispells. My steg was in combat with one unit of horrors and by the end of turn 6 my saurus (which had also been blasted with everything posible and only had the champion and Oldblood) were in combat with his 2nd horror unit (and herald). Victory points gave it to me by a hairs bredth considering I only had 3 models left - 1 steg, 1 suarus champion and my Old Blood. If I'd lost the champion I'd have lost.
I was saved simply by 6++ wards from the Engine of the Gods and a tough as nails Old Blood along with his lucky Saurus champion.
I think that if we played again I'd have a much better chance, I enjoyed the game immensly even though I thought I'd lost from turn 2 till the very last moment. I will keep the list and try against other armys. Thank you for the advice too and any more that may come, I am always looking to improve.