Progress:

Used my lvl 90 tank paladin to rush through the instances while having 4 disc priests in my back.
Pushed them on one weekend from level 1 to level 72. Currently taking a break (lots of work here).

I haven't needed any heal so far (bc of the level 90 pala tank) so the only thing I've set up is
the follow macro. I start 'playing' the toons when getting into the first cata dungeons.