Endurance Charges used for simultanous Discharge + Immortal Call

Short Question, I think about doing a Cast when Damage taken in Line with Immortal call (works fine with Endurance Charges) and Discharge. I have some Endurance Charges in my Build. The Discharge I just want to add for little Damage. How about the Charges. Do both spells benifit from my Charges? Does the "first" use them all and the second one gets no charge left? Can I choose which spell uses all Charges? Or is it random or splitted?

Thanks for your help

The first one will use all your endurance charges, and the second one will get none.

With cwdt, it will always go in the same order. You can determine the order based on skill gem placement in the sockets. See:
http://pathofexile.gamepedia.com/Cast_when_Damage_Taken_Support#Skill_Functions_and_Interactions
for more info.

uhh...ok, that means I can choose which gem gets the charges? thats pretty cool...thanks a lot for this info ;)