So, you want to complete an invasion...
I’m not 100% sure, but I think this is how it works.
During a “close the portal” event, there are different “waves” (not the 1st, 2nd, 3rd). What I mean by this is that the mobs spawn in waves. I noticed often that after we killed a champion, which is usually the last mob left over, the progress bar went down about 25%. Soon after that a bunch of mobs appeared again.
At least, this is how I think it works.. does anyone else have other reliable sources? The wiki page linked here was blank when I saw it
I think the bar goes down as the minion wave respawns. In other words, it takes energy from the portal to spawn minions, rather than take them down. So taking them down depletes the area, and which point they have to respawn, thus using the portal’s energy.
At least it seems like that to me.
The overall progress is event based, completing events depletes these bars.
The portal events spawn mobs in waves. Killing all the minions will then spawn the next wave and deplete the bar by 33%. When the last wave spawns the portal is closed and the event completed, and staying to kill that last wave is a waste of time.
Aetherblade events are morale based, each kill reduces the bar, when that bar is depleted the event ends. The Pirate Captain spawns afterward and is considered a new event, and is finished when he dies.
The Molten Alliance tunneller event simply requires the machine to be killed, then it’s done.
The Molten Alliance Shaman’s simply require the Shaman to be killed, then that event is done.
I think the bar goes down as the minion wave respawns. In other words, it takes energy from the portal to spawn minions, rather than take them down. So taking them down depletes the area, and which point they have to respawn, thus using the portal’s energy.
At least it seems like that to me.
We have a winner on that one. It’s definitely portal re-activation that drains the progress bar. You can see this clearly if you’re soloing one.