Well, the problem with coming up with a general strategy against O&G is that they have so many options that a general can field nearly any kind of army that he would like. That said, here are just a couple of general points I have found useful against the new O&G
(1) Beside savage orcs and kitted out black orcs, generally speaking your Saurus will be able to go toe to toe with his main blocks and have a reasonable chance of coming out on top. The difficulty is more so dealing with the chariots, cav, and characters that he will be using to tip the CC in his favor. Destroying support units of this kind is essential, and to do this a JSoD is very handy (dealing with chariots easily, and being able to charge first against all cav except wolves). If these fast elements are dealt with, O&Gs lack of mobile skirmishers (and generally poor shooting), will allow your own support units such as skinks and terradons to deal with his slower support units (archers, giants, war machines, etc.)
(2) The lack of amor across the board on O&G makes kroxigors less necessary (especially if one already has a JSoD to deal with chariots), so the extra points should go into terries, salamanders, or perhaps a steggie (terror is very useful if used away from a O&G general). Alternatively, Saurus cav. with a huanchi totem can get the charge off against boar units, and there sheer number of of Str 4-5 attacks are really suited for the role (which gives you one of the few examples where Saurus cav. are actually useful in heading off enemy cav).
Just some thought.