Welcome, and good luck with the transition from alt-tab boxing to real boxing - once you're set up, even with the most simple follow + assist method, the difference will amaze you.

I run a few 5 man teams, and my wife slots in with her tank from time-to-time. It's really dead easy that way, so if you could persuade your wife to start a tank and level with you running a 4 man healer + DPS team, that'd be a real bonus when it comes to L80 heroics