Dual-Boxing: Feral Druid/Holy Priest

Hi,

I'm currently leveling a feral druid. On the same account I have a level 70 holy priest. What I'd like to do, is to transfer the druid to a new account and start dual-boxing with these two chars. The aim is to use the druid as a tank and the priest as a healer for heroic instances. I'd just have to invite three dds.

Is there anyone who has ever played this setup and can give me a few tips? I know how to tank as a druid and I also know how to heal as a priest, but I've never done both at the same time.

lanea