I'm thinking of trying to just put nothing into dexterity, and not use any dexterity gear, and go pure strength.
I haven't done it yet, but I plan on trying this build soon.
Well, if your group isn't able to get by with just one hybrid, either you need better heals or a better group

But in the case you need a full time healer, yes heal mastery gear would be good.
Around 120 at mq is basically the most important. (more if you can afford it of course)
If you plan on getting gear to improve your heals in arena, get intelligence, so you have the defense of the intelligence.
PM me if you have any more questions
