That all looks good to me.
It also needs Swallow Whole. I'm not sure how to work it so that it will only Swallow stunned opponents, though. Maybe give it the usual Imp Grab and note in tactics that it only tries to grab stunned opponents?
OK, then, Swallow Whole without Improved Grab. Works for me.
Yeah, I thought about that. The problem is that stunned victims still seem to be able to defend themselves, which I would assume means they can make opposed grapple checks against the grapple. But I guess avoiding AoOs is a big benefit from Imp Grab.
OK, then, Swallow Whole without Improved Grab. Works for me.
Me too.
You know, I'm wondering whether we should upgrade the sizes so the Adult is Gargantuan. Maybe...
Elder: Colossal, 24 HD, Str 42, Dex 11, Con 27, NA +18, stamp 6d8
Adult: Gargantuan, 12 HD, Str 30, Dex 11, Con 21, NA +12, stamp 4d6
Juvenile: Huge, 6 HD, Str 18, Dex 11, Con 15, NA +7, stamp 2d6
"Baby": Large, 4 HD, Str 14, Dex 11, Con 15, NA +4, stamp 1d8
I also prefer the current sizes.
10/20/30 ft for the bite works for me.