How to sustain ES?

Hello guys,

I've been playing POE for a long time now and I've never made a ES or CI build until now.
I'll be glad if someone more experienced could explain to me how to sustain the ES.

I saw a lot of people in the past using leech, but I'm not seeing a good way to leech by a element spell caster nowdays. (Since the support gem was nerfed)

Do we rely only on ES recharge? Isn't the start of ES recharge too long?

Thank you all in advance.

Zealot's Oath, Leech via Ghost Reaver, or Recharge. Recharge can be interrupted unless you have Wicked Ward.

As Sentilial said.Also I can recommend such CWDT setup:
CWDT + Increased Duration + something + Phase Run
with ID gem high enough PR duration extends to 3.1s,which is enough for es recharge kick in.Of course,it scales even better when you add additional es gain sources,like Zealot's Oath (3.1 * your ES regeneration rate),and/or faster start of es recharge.Zealot's Oath is quite easy to get,just have such flask.

Occultist's Wicked Ward and Vile Bastion ascendancies, and Trickster's Patient Reaper and Ghost Dance can also help a lot with ES recovery.

Edit: Essence Surge on the main tree also helps recharge start. Between this and Ghost Dance, you can get 35% faster start of recharge. With halfway decent evasion, I can have recharge starting in the middle of melee combat.

The correct answer is Ghost Reaver + Vaal Pact + Vinktar's