Thanks for the response everyone. I appreciate it.

To just clarify somewhat, my shams are absolutely nuking heroics. My Pally is geared pretty well, has well over 30k HP unbuffed. I click tank.
The 4 x ele dps works a treat, they are all in full heroic/badge gear and tote about 2.3k spell.
But I really don't like stopping dps to heal. I just think that having a dedicated healer would "appear" to be the best way to go about it.
It's interesting that others are doing as I have been and think its fine. Dont get me wrong, the 4 x stop and chain heal works well, but
it reduces dps....considerably. Drags out fights longer and can create issues.

With the four dps setup, they all pull well over 3k dps on bosses. For example, can nuke the last VH boss before the first belly port. I like being able to do that.

Strangely enough, with the 3x ele, 1 x resto setup, I just equalled my fastest Trollgore kill......go figure. Sooooo crit based, its really hard to get a figure on
your average dps.

I was thinking that having a dedicated healer in the group would make the more problematic instances easier in some ways.

I guess not. From the responses here I guess it all comes down to your play style and what you are comfortable with.