I took a closer look at the
[...]along with Blessing of Kings/Sanctuary and Improved Gift of the Wild.
For example, if a Blood Tank with 3/3 in Vot3W (+3%), is in Frost Presence (+6%), using Rune of Stoneskin Gargoyle (+2%), and is buffed with Blessing of Kings (+10%) and Improved Gift of the Wild (+2%):
Total +% Stamina = (103%)(106%)(102%)(110%)(102%) = +24.95% Stamina
That means that 1 point of Stamina on gear will effectively be 1.25 points of Stamina for the Death Knight, or 12.5 health per point.