I think Hunters + healer are probably, next to arcane mages, the best possible PvE team.

With the pets tanking some of the 10 man raid content I would not be shocked in the least if most heroics once you get geared out, are more or less faceroll. Send pets, blow up with arcane/steady spam. Keep mend up and keep your heals ticking on the main tank. Set your healer to heal via a target of target macro.

Set your heals up in isboxer something like this.
Step 1
Target the target of your target.
Set focus

In another keybind
Heal focus via this macro
'/cast [target=focus,exists][target] (whatever heal you are using)

That macro will heal your focus if you have one, otherwise it will heal your target, or yourself if you cannot heal your target!

Probably setup a focus macro to quickly reset your focus to whatever the target is DPSing. Have a second key to actually do the heal.

So like key 1 = set focus off of target of target.
Key 2 = heal focus or target if no focus set.