Eldritch Battery

uh so it shows i have 8k Es but only get 2k mana??
why does it say "ALL ES"?? ALL ES from where??? if not all then why does it say "all"? all flat? all%? all on passive? all on gear?? which is it??? i lily got item for ES/mana regen trying to do with mom but the build doesnt work just cuz this node dont work as what it says.....