End trigger after all objectives met

Sorry for opening a new thread for this but the others don't seem to answer my question:

What is the best way to end a mission via a trigger after the 3 objectives are complete? I'm using the method I used for A1 but it doesn't seem to work.

I have a trigger with:

Condition:

this && obj1_done && obj2_done && obj3_done

All I really want is the mission to end after all 3 objectives are met and the player returns to base. Doesn't really matter the set up, just a nice simple way.

In the condition area put:

taskCompleted TASKNAME1 AND taskCompleted TASKNAME2 AND taskCompleted TASKNAME3;

Edit: The TASKNAME# being whatever you've named your objectives in the briefing.