Well, using 90% of max stats and resists as my baseline, I found myself a near-perfect cu last night
Resists 56/40/84/48/85 = 86%/89%/99%/96%/100%
Stats 606/84/271 = 99%/99%/93%
He's not a fancy color - that ice green shade with white (looks like now I gotta spend a vet reward on an ice green robe!) but I think he will serve me well!
My copper cu (which I will keep for looks, and he's not bad in numbers either) compares to max at 92%/100%/95%/84%/86% and A-OK in the stats category.
I think I need to make a web based cu stat calculator.... (well probably for other pets too hehe). *maybe a project for today*