thats way too low to be using ES, for every point of damg ES drains 2 points, each pt into TK reduces that amount by 6.25% so u end up taking 1/3 of the damg to mana and a miniscule amount to life hence the HUGE mana pool of 3k + if u intend on maxing it, ive used my barb vs a ES sorc using 2*ebotd 414ed and 412ed and only took out HALF his mana and like 1/10 of his life(1.4k total) he told me he maxed ES and had 3k mana o did i mention he had only 10%dr from shako?