I'm still trying to get a definitive answer on what the SE_Stamina effect does, currently in the code it reduces the cost of endurance use by an amount.
Currently SE_Endurance effects increase or decrease endurance.
Ex:
http://lucy.allakhazam.com/spell.htm...02&source=Live
If I can get a definitive answer on how SE_Stamina is supposed to work I can see about changing it, probably go log onto live again and ask my friends who still play.
On another note a lot of endurance using skills still need a lot of work too, some don't work quite right and some not at all.