Brood (4-8, typically 2-4 pairs).
Let's say Usually NE.
Advancement 8-12HD (Large) I guess. I don't really feel like having them get bigger.
Also, weren't we going to make them monstrous humanoids rather than magical beasts?
Updating the Gladiator Lizard Working Draft.
Hmm, Magical Beast doesn't feels right.
The humanoid being that "projects from an egg" to geas victims to the Bleak Shore doesn't seem like a supernatural animal, and the Lizard is described as resembling an oversized armored human.
I'd go for either Monstrous Humanoid or Outsider (Native), depending on whether you want it to have Good Fortitude saves and lots of skills or not.
I definitely prefer Monstrous Humanoid (and that was my first instinct, too).Monstrous Humanoid for the gladiator lizards, I guess. If you want to stat up egg guy, I could see a Native Outsider. I still think he's a different species. Does that work for you?
Sure, I'd prefer 8-16 HD, but I don't mind 8-20 HD if you really want.
Here are the important quotes on type, but it didn't make it to the working draft:
I definitely prefer Monstrous Humanoid (and that was my first instinct, too).
Let's go with Monstrous Humanoid for the lizards and Native Outsider for the Egg Guy (even if he's a Bleak One, he will forever be Egg Guy for me). We could give the lizards the (extraplanar) subtype, I guess.
CR 6 I guess. They're a little better than a girallon but not as good as a hill giant, I think.
Eh, let's make them a tough CR 5.
Anything particular about tactics from the book? I think I'd just emphasize that they usually try to gang up on a single opponent at a time to take advantage of their hive mind.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.