From Diablo Wiki
Flux: The stats are sort of a mess. They're mostly from our old Darkness monster site, but are from about v1.07, D2C. they're way low for D2X; regular Hell Bovines have much higher values for most of those stats.
I added in the TC info, but that's from v1.09 D2X; there was no TC 66 in D2C, for instance. There's no Cow King page on the Arreat Summit, so better stats are pending someone pointing them out on another site, or ripping them from the game data files.