[2019] How do you calculate the cap for ES leech? (with Ghost Reaver, Vaal Pact and Vixen's entrapment interactions)

Previously, PoE had no ES leech, but Ghost Reaver applied life leech to ES (in a specific way). That is no longer the case.

In 3.6.0, ES leech exists distinct from life leech, and is it's own thing. Ghost Reaver now works by making any effect that would give you life leech give you ES leech instead. Because this is ES Leech and not Life Leech, no modifiers that apply to Life Leech will affect it. Only modifiers to ES leech will affect it.

Vaal Pact only affects life leech, and thus has no interaction with ES leech.

The unique Soul Tether has a different mechanic, which is also changed. It lets you leech life, but while you're on full life, your life leech effects are not removed from you, and those life leech effects will recover energy shield rather than life. They are still life leech effects, not ES leech, and thus are scaled based on life, and affected by life leech modfiiers, not ES leech modifiers. This is so that item can continue to fulfill it's role of letting hybrid ES/life builds use life leech to recover both statuses.

You will leech life instantly, and recover ES instead from that instant leech when life is full. It will still be isntant.

Also, in contrast to the current mechanics, a single instance of life leech can bring you to full life and then apply the remainder of it's effect to ES (regardless of whether you make it instant or not), because it's only changing where the recovery goes, not anything about what the leech is.

In the previous version the excess from that leech was wasted, and when you next caused leech, because you were now on full life, the new leech was modified to apply to ES (because that was something that needed to be determined when the leech occured and couldn't change).

Can you now gain life leech instances while at full life by hitting an enemy while wearing Soul Tether?

Yes -that's part of the effect of not removing them at full life. Besides, otherwise the item wouldn't work.

Are life leech instances removed when you reach full ES?

No, life leech effects are only ever removed at full life. If this does become a balance issue, we could change Soul Tether to remove them at full ES instead, but to my knowledge this hasn't happened yet.

Glad you like it! I was really happy when I came up with this solution to keep the belt working under the new system, and work for hybrid builds while only needing life leech modifiers (not also having to get ES leech ones).

It also has the side effect of making it much weaker with CI (because you're still doing life leech, both the maximum total leech rate, and the new maximum amount per leech are still based on your max life, which is 1), but it should work more smoothly with hybrid builds, which is the main point as I understand it.

Is the wording on Ghost reaver going to be changed?

Yes.

No. We changed what the existing stat it has already does (and how it's described).

So, in 3.6, do you determine the leech recovery target for each network frame?

No, that would be entirely unecessary. If you have Soul Tether, when the "on full life" stat changes, that causes the stats for total life recovery per second and total ES recovery per second to both recalculate - and one of them (but not both) will include the total recovery from life leech stat in that recalculation, based on whether you're on full life or not.

So not every frame, only when the "full life" state changes.