Before PTS 1.6 week 2 1 stamina = 30 hp. Now when you're above world tier 2 1 stamina = 15 hp. This was the cost of the "free" 80k HP everyone received at WT5.
Here it is in the game files (/juice/attribute/dictionary/attribute_dictionary.mdict)
AttributeDefinition PrimaryDefensiveCalc < uid=5D312600560425610000764DAA1E2D60 >
79 {
80 myOriginalFormula "PrimaryDefensiveFinal * 15"
81 mySpecializations
82 {
83 Specialization "Bracket 0 and 1"
84 {
85 myCondition "Agent.Bracket < 2"
86 myFormula "PrimaryDefensiveFinal * 30"
And in game: [http://i.imgur.com/EnFFsAu.png](http://i.imgur.com/EnFF