es-leech gem best for attack hybrid life-es builds

the es-leech-support gem is almost zero on a spellcaster, since you have great es-leech-passives, and you most likly end up with a 13%es-max leech rate,
unless you destroy your life-leech with ghostreaver for 26% or 30%es-max-leech rate


on cwdt-disco,
more heal results in more damage!
multispell casts do low heals, but sick damage, 4%leech often only apply a 1%leech of total damage done (minions for example/rounded down/to many leech instances)