Here are the default numbers:
key "VitalityStartingAmount","18"
key "VitalityExponentialGrowth","1.28"
key "VitalityLinearGrowth","12.5"
key "FirstVitalityLeapLevel","9"
key "FirstVitalityLeapGrowth","1.25"
key "SecondVitalityLeapLevel","13"
key "SecondVitalityLeapGrowth","1.5"
key "ThirdVitalityLeapLevel","16"
key "ThirdVitalityLeapGrowth","1.25"
key "FourthVitalityLeapLevel","18"
key "FourthVitalityLeapGrowth","1.5"
As you can see, the exponential growth of 28% is a lot by itself. But then the leap growths at levels 9, 13, 16, and 18, are just extra ridiculous ( think they mean that at level 18, say, vitality is suddenly 50% greater. That's just absurd.)
I basically eliminated the leap growth, and brought down the exponential scaling to 1.10.
