Okay, so I just managed to random into a group with a war that was in full ilv180 gear, except 1 ilv170 accessary. He had 21.7k hp. Lets assume a full ilv180 with 190 weapon war can get to 22k hp.

Using the numbers given to us by our ilv 180 sch

Critical! You recover 6123 HP.
 You recover 4173 HP.
 You recover 4159 HP.

We get with a 22k hp war.
~19% heal non crit and ~27% heal crits. All in all, currently lustrate is better than it was on dps and healers, and about, but not quite as good as I was on tanks.