What is Lydia's preferred armor loadout?

(Related to this question) what is the ideal set of armor for Lydia? I know she's a heavy armor kind of gal, but from the other question its obvious bigger isn't always better. Should I smith her armor so it is unequivocally better, or will she still prefer, e.g., an ebony helmet?


In my experiences, companions equip the item with the highest sale value, not the highest armor rating. It appears the same thing applies to weapons. Can anyone confirm this?