8th Ed. My current lizardmen core

[MOMUS]

Fantasy Army: Lizardmen
To be used in 2400pts games in competitive environments.

10 skirmishers
10 skirmishers
10 cohorts
10 cohorts, msc, banner, krox
20 cohorts, msc, banner
30 cohorts, msc, banner

exactly 600pts

the cohorts are zippy and shooty, easy banners and a pain to charge. the smallest unit is a speed bump while the skirmishers are great all round and usually hide a character or two in them.
i usually play in comp where no more than six skirmisher units are allowed total (the others being chameleons and the like) and you can only have 3 cohorts max (unless they inc krox). Shooting cap is avoided due to short range.

 

[JakeFlash]

Hmmm.

I see cohorts as bunkers/Cowboy delivery units, and I would make them 20 big with full comand. I wouldn't bring more than two (unless you run slann & Tetto) as they have problems tying decent units up and they lack punch outside of poison shooting.

So up the skirmishers and bring down the cohorts imo.

4 skirmishers (so you can still fit in 2 units of chamoes if you like that)
2 Cohort units of 19+brave and full comand.
1 cohort of just 10 with nothing else.

Then you can still have two units of Terradon/Chamelon/Rippers and you will in all likelyhood win the "chaff war".

I feel the lone Krox is just there to die and feels like a waste of points.

My 2 cents.

/Jacob