Quote Originally Posted by TheUltimate3 View Post
Healer fails to heal, the tank dies group wipes. However, provided that the dps do enough damage to kill whatever's beating the tank before the tank dies, everything is gravy.

Separating the DPS into a separate place (or so) and have the tank/healer twiddling their thumbs until the DPS return or a new legion of mobs show up seems...excessive.
Healer and tank would still be on boss fighting they aren't just twiddling!