I suppose, each to their own. I just haven't found the tank damage to be so intense on our healers, not yet anyway, to make a concern about my HP. We've actually been using DPS trinkets, foods and flasks lately just to boost our damage (me and my pala tank partner that is). I would still maintain that getting small heals when you don't really need them is a sort of waste of GCD. Enrage regen heals more and is more useful in those high tank damage spikes, like Elagon's last phase for instance.
Btw, I trust we're talking about Impending Victory and not Victory Rush?
In the beginning of Cata, I was able to go all out on mastery, because of the way shield block behaved. Now shield block is guaranteed to make us block the hits and it is relatively easy to maintain a high uptime. Particularly now, with low level gear, I think I much prefer stamina over mastery. So it's a very different kind of beast, compared to Cata.