Leech is still broken (Chaos Monk + Mana Leech)

Hi,

I have a Lv 77 Acolyte of Chayula with 1772 ES and 742 mana.
I have a Pillar of the Caged God build.
I have 255 str, 212 dex. I have 17k dps on basic attack:
2303-5114 damage

Physical: 1472 - 2676
Fire: 458-858
Cold: 343-687
Lightning: 30-893
4.1 attacks per second

I have 6.87% mana leech from items.
I have 34% increased mana leeched from jewels
I have 24% increased mana leeched from passives
Basic attack is using martial tempo, close combat, elemental focus, heft. When I unlock a 6L I suppose I could use mana leech to test it...

Fighting cruel Doryani, I can leech about what I think is 150 to 300 ES per second while basic attacking. This boss I imagine has less leech resistance than map monsters I normally fight.
For context, my monk survives a T6 breach for about 5 or 10 seconds before being overwhelmed by damage, lol.

For all the setup and investment (item mods, passive skills, ascendency points, support gems) and all the lack of support in the game right now (very few monk skills do pure physical damage), I don't see how a freshly minted endgame character is supposed to use this mechanic. Maybe if you min-max it to absurd levels, you can have reap some benefit, but it seems overly farfetched to me I'll be able to leverage it with all the constraints placed upon it. It's not worth giving up passive ES recharge for.

Now I have to spend 160k total gold, my punishment for testing this :) I'm going to go make an elemental build now and stop trying to use physical damage - it's a huge handicap.

Even if you double the amount of ES recovery I get from this ascendency, it just doesn't seem strong enough - I am trying to find a way to battle breach monsters in melee as a chaos monk, but it doesn't seem feasible with no physical aoe clear, I am stuck with charged staff + basic attacks, lol. The other physical monk skills are just not suitable for the pace of breach right now.

Since I am (stuck) using basic attack, the mana leech component actually doesn't matter either, lol. Maybe I should be going for MoM?

On top of that, most of Physical Qstaff abilities are bugged:

Wind Blast:
https://www.pathofexile.com/forum/view-thread/3641459
Mantra of Destruction:
https://www.pathofexile.com/forum/view-thread/3641145
Whirling Assault:
https://www.pathofexile.com/forum/view-thread/3642297

Check out my Breach rework idea and give your feedback if you can:
https://www.pathofexile.com/forum/view-thread/3642593