Alrighty, let's take a whack at this thing.
First off, your BSB can't have any other magic gear. Thems the breaks, but keep the man on that cold one for the +2 AS and mobility. The Lord/heroes look pretty good, though the Scar-Vet with Venom of the Firefly Frog might be a bit better with an additional hand weapon than +1 Str.
2nd bit is to definitely bump those Saurus blocks up to 20. Gotta remember that Dwarf gun lines will eat through troopers, so having numbers on your side for when they punch through will be handy. Your call on where you pull points from. Though you can drop the champs and get an extra Saurus from that alone.
Next up is the 3 lizard squad of Kroxigors. Without skinks to help soak up fire, these guys have a good likelihood of drawing fire and getting toasted pretty early on. I'd vote to either drop 'em, or take a page outta Vaz's book and get a squad of 16 skinks with 2 Kroxigors.
Moving to your Cold Ones, I'd suggest dropping the champs (again, points involved for +1 attack at a bit much), and possibly dropping one squad entirely. Could switch them over to a unit of 7 Terradons for about the same cost as the 215 squad. They'll have enough wounds and maneuverability to get into the back ranks quickly to cause havoc on any gun crews. And move the Sun Standard over to the BSB. 5 Cold Ones don't need that nearly as badly as a mass of Saurus's do. Or you could lump the Cold Ones to one squad, making the Sun Standard a worthwhile choice.
Lastly, your rares. Figure out a way to get that 3rd Salamander and Razordon. These guys will save your ass! Against gun lines or heavy armored Dwarves though, the Razordon may be a lackluster choice. Switching over to a full 6 Salamanders may be a very good idea in the end.
My 2 bits on this list, hope it gives you some more ideas.
Some good Points, I'll deal with how I'm thinking bout them right now. The Krox are out there TO attract and absorb fire. I want to give my opponent a choice between the Krox and the Cold ones. I do not mind losing something if it forces my opponent to do what I want him to. I may push the cold one riders into one group, I'm still on the fence about that.
The Saurus Block is at 20. It's designed to have the 20th Saurus be the Frog Veteran. The second is not at 20 because I don't have more than 12 of them painted yet. Limits of time and space. And No terradons for the same reason - don't have any ready. Otoh, I have played with the 2nd small saurus unit, and have had good success with it as a harrassing unit.
The Razordons are actually there to draw my opponent's fire. Again, I don't think he'll be comfortable with them marching at his gunline, and that will protect the Salamanders as they jockey for position. I'm still learning on these units, I do appreciate the commentary on that.
I've said other places I like having champions, it gives me a flexibility I'm comfortable with.