Cata instance healing: Marcro vs. Click regions.

[Atrocious]

I've been 5-boxing for a while now, but I'm having trouble with healing in the cata instances. I had no trouble healing my team in BC or WoTLK instances using repeater regions in conjuncture with HealBot. Also single boxing my Resto Druid in cata PUGs I have no trouble healing a group which does not necessarily know the strategy for a given instance.

After reading a lot of the posts, seems most use repeater region healing with some form of addon.

So I've come to the conclusion that I might be doing something wrong. Some of the cases I can think of are:
1. I cannot heal my 5 box group in the same manner as I would when single boxing a PUG. This can very much be the case as I rely a lot on lifebloom, regrowth and swiftmend. Only rarely I have to toss a Healing Touch. Sure if the tank isn't able to hold aggo, I have to toss a few emergency heals to other team members, but this mostly gets the job done.
2. I'm under geared. Not sure if this is the case, as avg. item level is high enough for Vortex Pinnacle, so the instances lower that this I should be geared for.
3. My dps might be too low and I'm unable to burn down mobs fast enough. The numbers I get are usually around the following: Pally 3.5Kish, Warlock 3.8-4kish, Mage 4-5kish, Shaman 3-3.5Kish.
4. I don't use CC. Planning on adding this to my setup, with my classes I should be able to CC at least two mobs.
5. Use a macro to heal most of the time, and use click region healing for spot healing.

I got a strong feeling that it's point 5 (and probably 4) that are my main problems. Which begs the question posed in the subject, do people use some form of hybrid methods for healing in Cata instances, or are everyone using repeater regions and an addon?

Anyone got any pointers?

My team is as follows:
Prot-Paladin (84)
Resto-Druid (84)
Fire-Mage (83)
Demonology-Warlock (83)
Elemental- Shaman (83)

Any help would be much appreciated.