Steel Garrote + Streetfighter lifedrain tanking questions

[Zoda]

I started a new run where I aim to make my watcher a ranged single target dps guy by the endgame (Soulblade + Shattered Pillar, with the plan to use Chromoprismatic Quarterstaff + Instruments of Pain). I want a 2nd Tank to hold the line beside Edér, and I'm thinking about a human Steel Garrote + Streetfighter combo. The plan is to keep a dynamic balance of health right around the bloodied mark, but not sure if I could make it happen as I'm planning to, so I'm asking for your experiences.

The plan would be to wear all the engagement gear: Reckless Brigandine + Kapana Taga + Last Word + Champion's Helm for most engagements (Akola's Apex Ward, Thaos' Headdress, Sungrazer and a number of other weapons also kept at hand). I would keep a reasonable CON, so being bloodied is less risky. Edér would be geared for deflection. 

He would also be supported by Herald healbot (troubadour + shieldbearer), with the possibility to also chant Old Siec

Has anyone tried such a lifedrain tank? Can it actually survive on lifedrain in tougher encounters?

Also is lifedrain affected by + healing done enchantments?

Thanks for your answers