Anti rush idea

[ZatarRufus]

Some maps can only be entered through a RED portal after solving a quest (i.e. Canyon of the Magi, Nihlathak's Temple), so you cannot set the feet yourself on those first.

True. However, those could be set so that one must arrive at (and take) said portal which then puts the character in, for example, the Canyon. After that, the character could use anyone's blue portals to that area.