Okay, then let's start with Dicynodon.
Upsizing the Diictodon gives the following ability scores:
Str 9, Dex 10, Con 13, Int 2, Wis 12, Cha 4
I'd advocate increasing the Con score to at least 15. I'd also give it a natural armor bonus of +2 for a total AC of 13 (+1 size, +2 natural)...