Welcome to Librarium Online!
I am currently working on a project that involves me taking apart the night goblin spider riders thingys from battle for skull pass, and sticking skinks with blowguns on them.
I have also finished a custom army standard. It is a Skaven Plague Bell (I think it's called) with Lizardmen glyphs on it. It is carried by two saurus, and a custom skink with somthing to ring it with. A rules that I have made for it is, is that if a skink priest or a slaan are within three inches of it, it "counts as" an engine of the gods.
Zlat, itza hex, loq gor, goq huan.
Like the idea of the skinks on the spiders. I'm not much for the cold ones the lizardmen get, so they're going on DE cold ones.
Your army standard sounds like a 'house' rule idea. Good for friendly games, and battles in the basement, but you won't be able to use it in GW stores/touries/and the like.
If you could slap up some pics, it'll be interesting to see what your models look like.