If you have hotkeynet working why do you need to change window to move and heal and why is your tank not mashing his tank macro whilst you do that. Assign a seperate set of movement keys for your druid and have an easy tank macro that you can mash whilst you are doing anything that requires concentration. With only 2 characters to worry about you shouldnt have as many issues as a 5 boxer who sometimes has to spread out his chars or move 1 at a time out of fires etc.

To put it more simply, you need to break both characters abilities down to their basic form, have 1 button for tanking, 1/2 buttons for healing (hots/big heal). Learn to strafe your healer whilst still tanking and healing.

Hope this helps

Edit: I forgot to say that with only 2 80's I think asking for heroics will be a bit much unless both your characters outgear the content by a mile. There may be a couple of bosses that you could do but for the most part you wont have enough dps to kill the mobs before your healer is oom.