Moving from 70 twinking where resil was preferred over stam stacking (which was considered being a mana sponge) I can see where your mindset is coming from.
Problem is armor is not even close to what resil was and I am not sure how it even scales with defensive versa but I guarantee it’s not additive.
I did make an armor build to see what we can achieve for my feral. Was about a 7% increased reduction in cat and 3.2% when in Bear, so it suffers from (DR?) or is least effective the more you have anyway. My FC build is stam/armor gems but i hit like a wet noddle anyway in Bear.
With a bit of napkin and common sense I have decided I am better off with the agility stam gems. Like someone said, 2-3 raptors will probably kill me regardless what gems i have but if i do get a heal off or get a healer spot my HP dropping chances are with stam they are more likely to finish the cast.
TLDR: I get your point, but I believe there is better choices.