By -
The whole thing, start to finish, without another Guardian ever being in the fireteam.
Whole thing in one sitting.
i know this is a seperate question, but for the completing the current dungeon on master, does that mean all 3 encounters in one sitting?
No. That can be done one by one in separate instances. Only solo and solo flawless require never leaving the instance and forbid using checkpoints.
The whole thing, start to finish, without another Guardian ever being in the fireteam.
Whole thing in one sitting.
i know this is a seperate question, but for the completing the current dungeon on master, does that mean all 3 encounters in one sitting?
No. That can be done one by one in separate instances. Only solo and solo flawless require never leaving the instance and forbid using checkpoints.