Resist never change
Magery take 10% off Pre-Tame or simply accept the Post Tame value. It will never train higher than the Post Tame (unless it is less than 100?).
Pre - Tame
Stats divide by two except int/mana
Take 10% of the skill and subtract from the skill. Anything less that 100 will train up to 100.
Post Tame
Stats are what they are, dex/stamina will train to 125
Skills multiply skill by 1.25 that is the max value unless it is less than 100, then it will train to 100.
Anatomy should be 0, if it is not then either the GD killed / fought people before being tamed or has fought after being tamed. Anatomy will never go over 100. If one assumes that the GD has been partially trained then all things being equal, then one can assume a reasonable proportionality to the other skills having been trained.
Such that if Anatomy is 100, then the other skills are probably close to or at max.
If anatomy is 90, then one can assume that the other skills are probably close to 90% of max.
Resist spell is probably exempt from the above.
Heck just go round up some spellbinders (6+) and let them play with the GD for a couple hours and that GD will be at max Resist Spells and Dex/Stamina should be at 123 or so (the GD will be debuff'd).