You need to be a bit more subtle than that I think. Maxing on brute force either won't work, or it will produce a one-trick pony list (albeit a very nasty one).
The trick is to take a potent special rule and exploit it beyond all reason. Examples include the Nurgle Daemons and Tallyman (in 7th) and the Horrors of doom list (7th only). The horrors of doom worked by having three units of horrors so large it was impossible to break them in combat, especially as each unit was a Lvl. 4 wizard.
My advice with that list you've given is to split those Saurus units up into smaller units (look at the Saurus numbers thread in "General Warhammer" for a guide), thus giving you about 6 units, which you can use to dominate the movement phase by boxing your opponents in and giving them nowhere to go but into a very unfavourable combat, using the Slaan to offer support via magic by weakening unpleasant units and boosting your own (experiment with magic lores to find which is most suitable, but life or Death may not be a bad call).
I'm not that experienced with Lizardmen but I'm sure others will be able to build on this advice.
By the way, what exactly are your opponents using that is so broken? I'm sure you just need to change your approach to army building and tactics and you'll start doing better.