lizardmen are my favorite army in warhammer ever mostly for the fluff. while the fluff has changed from book to book every so slightly, i think gw do a fine job of it.
havent gotten a hold of book 8 though and its killing me! but the building blocks are there to make what you want out of it
i like to view the slann as they are written in the book, almost god like and beyond approach where only a handful can be spoken to by them, all the while they remain practically motionless, making even their slightest glance or lifted finger UTTERLY terrifying!
when it comes to the "free will" of the saurus and the skink i like to play around a bit.
my vision of them is that the saurus each how their own personality and free will. they are free to do as they like to an extent however they all share an unshakable loyalty and confidence in the slann and the old ones and have done since the crawled out of the spawning pools. they may argue among themselves over leadership and the course of action they should take but when a word comes down from a slann through whatever channel. all doubts or arguments drop and they do their lords work.
the skink i feel are much the same but have a lot less to worry about, being the artists and the doctors and the sculptors and the poets. combing the jungle for whatever they feel they need for their next project. a new potion ingredient, some more pet snakes to breed or some flowers for incs or perfume. they make up the bulk of the normal citizen of the temple cities. everyone's gotta have civilians right?
they also appear to be the shortest living of the lizards suggesting there could be skinks going through their teens and been sports nuts and then older skinks taking care to show the new ones how its done. ect.
all lizards share a bond with whoever they spawn along side. often forming a regiment or a pack for whatever purpose they were born to do, but its an incredibly lonely and isolated life for those spawned alone. while some are spawned to the rank of celebrity, signaling some great event in their time or to be a great warrior, some are just spat out and left to fend for themselves.
i like to think that skink skirmishers are some of these guys. lonely skinks popping out of the spawn pools resenting the people around them who were born with a sense of family. eventually they find each other and feel there,s no room for them in the temple city, living in the jungles.
anyway
i could go on and on about my fluff for each lizard but the point is i love thats theres room to do so
just wish lizards got more love than they do