Good, then stop tanking. If you're doing 1 pack at a time then you're a bad tank plain and simple, there's literally no reason to do 1 pack at a time and I have one very simple reason why, that being the healer will literally have nothing to heal and they will be bored senseless, there's nothing more brain dead than playing a healer with a tank that does 1 group at a time and the healer is sat there spamming 1 for 30 minutes straight.