[zone/client_process.cpp, ~line 1688]
find:
Code:
regen = int(level*4/10) + 2;
regen += spellbonuses.EnduranceRegen + itembonuses.EnduranceRegen;
add below:
Code:
regen += GetAA(aaHeightenedEndurance);
BEFORE:
Code:
regen = (regen * RuleI(Character, EnduranceRegenMultiplier)) / 100;