I can't really comment on the macros - as you saw in the other thread, I'm using very out of date specs and am not au-fait with the changes in Rift over the last couple of months!

I would highly recommend going for a dedicated healer with something like ClickBoxHealer to allow you to heal the group from any client screen, though. At the moment, you must be wasting cast time (even an instant uses the GCD) on heals that are not needed at that time and, presumably, it can all start to crumble if they're DPSing when a heal is needed?

In addition, I have a hotkey that swaps my healer into 'dps' mode, bringing down hotkey bar 2 with dps+dot spells on it. I can then use my 'dungeon' setup in zone events and major rifts and have the healer apply DPS until I need a heal, then a quick keypress swaps back to spell bar 1 (which has nothing on it) allowing the ClickBoxHeal clicks to work. This makes the team very flexible.

One tip I found very useful... set up DPS and Healing dummies in your main chars Dimension and give your other chars access, then you can practice in private.

Inevitably, multiboxing the dummies in town would get a lot of attention and too many whispers when you're busy trying to set things up!
I also found that other people would fire on the target dummy I was using and get lumped in with my own DPS meter results.
All in all, much better to configure and practice in private!

The dimension is also great for the group to nip to when you're in the middle of a zone and need a bio break but don't want to waste your recall and don't want the hassle of logging off