Just a test, not a final build
"15% of damage taken leeched as life during effect" flask suffix + life recovery rate, recoup and Progenesis flask
Based on this video: https://www.youtube.com/watch?v=wLrtzbX3e8k
Initially I tested with Wurms Molt but it wasn't needed because I get so many leech instances that leech is capped instantly anyway.
Build ends up with 10m dps instead of 40m on wardloop with similar gear, but can have capped spell suppression, twice as much life and 10-20k evasion. Still probably not worth it but maybe someone can figure out a better setup
https://pobb.in/AGehMPKFVoLV
Another thing I found is that with Progenesis (and petrified blood) you take a portion of the hit as damage over time. So let's say you take 6k dmg and 4k over time instead of 10k. But you still recoup as if you were hit for 10k