Offering to the Serpent gloves. They can actually be quite good and have random Synth implicits.
I think the less maximum total recovery per leech is a non-starter on these. I need the leech instances to last longer than my reflected poison instances so I can use Golden Rule + Tainted Pact and self poison as an "immortality" mechanism. I believe I'll run into suicide scenarios where leech instance runs out before poison does and I insta kill myself with these unfortunately.
The idea is essentially this:
Pathfinder Poison Forbidden Rite.
Use the "15% of damage taken from hits is leeched as life during effect" crafted flask mod. Forbidden Rite procs this.
Use Golden Rule to reflect my poisons back to me, triggering Tainted Pact's "Taking Chaos Damage over Time heals you instead while leeching life"
Use Icefang Orbit + Winterweave to self chill for action speed.
Add in Forbidden Taste as a life flask with no downside and additional big heals from flask effect on its chaos damage over time "downside".
I can remove Forbidden Taste and use Petrified Blood to never lose my leech instances, but if I used those gloves, as I understand it, my leech instances will go from lasting ~5seconds to lasting ~2.5seconds. Making sure I forbidden rite to proc the flask effect every 5s isnt a big deal. Cut that 2.5s and I'm pretty sure I'd be in for a bad time.
I've been racking my brain trying to figure out a way to do this in budget gear (since the uniques needed are all dirt cheap) as an early league blaster in the future. But I think the only way to really do it is to go Ascendant with PF and Slayer. Petrified Blood is just a french fry when ya shoulda pizza'd thing at lower gear levels. Its one shot city.
Forbidden Rite is just a really cool skill and if you stack enough max life (or max ES with the trans version) it has another cool effect of allowing you to use CWDT to do things like trigger your curses with no downside and at max level.