There are two events. Start the event on top of the SW cliff. First event is to CC mobs and to destroy the crucible. The second event is a champ forged. Click ↻ after defeating the champion.
While there is a respawn timer, it will not respawn if the race is setting up or has begun.
There are 2-3 events. After the escort, there is a defense mission. If it fails, it could spawn an assault mission. Click ↻ after either of these have been completed.
There are 2 different locations for this event. Only one can spawn at a time. When one finishes, the other location will be the next to spawn.
Click ↻ after the opposite caravan (W->E, E->W) has been completed.