if that's the case, then you should go for the healing chest. Like they write in wowwiki, it's the only leather piece with so much +healing for a while and if you want to be like i think you want (being a hybrid class) you will depend on different kind of gear along the situation and encounters you will be in.
And you're right, the feral chestpiece can easily be replaced when you go to scholo/strat/lbrs instances.