i have 2 accounts now . Wich are both good geared : prot pally and Holy/disc priest

I would like to run some instance with dps's who i will find on the server then .
I did some multiboxing before with 2 acc ( 2 shammy's ) . Worded fine both dps .
But the healing part i realy can set ipwith iSBOXER . have no clue where to start .

if some assist would be great

Greetz