Well, if you want the true minimum ilvl experience, you should turn the echo off =P

But to give a proper answer (this goes for First Coil Turn 1):
The minimum ilvl here is 70, Echo adds 30% to your health, damage dealt and healing received.
I'm sure there are more indepth ways to do what I did to reach an estimate, but I looked at an ilvl70 chestpiece for tanks and checked how much vitality it would give - its 22. Add 30% and you're at 28-29. An ilvl80 chestpiece has 27, ilvl90 offers 33. So that would suggest that your health gest adjusted to something thats a bit higher than ilvl80, but not has high as ilvl90?
Since there isnt one clear stat that scales with damage and healing its a bit more difficult to figure that out, so for the time being I'd take a guess and say its about the same?