These are level 59~ events. Amazing and nonstop exp.
Mobs give 100+ a kill with no bonus.
I labeled the events 1-4.
First event starts in a town, you will deplete the Flame Legions morale.
Next event run Northwest to the bridge. They will construct mortars.
Next event cross the bridge and walk into the large room in front of you. You will complete the event that will fill up a bar.
Event #4 spawns immediately after. You will purposely fail the mission telling you to kill 10 waves. THIS IS THE KEY PART OF THIS
Event #5 spawns and you need to defend your mortars. Complete this event and you'll notice you are back on event #3 where you fill the bar.
If you fail at any point, event #1 INSTANTLY respawns.
There is ABSOLUTELY ZERO DOWNTIME
ALWAYS fail the Wave mission.
Additional comments:
You will sometimes fail on the "defending of bridge/mortars" If you do, simply run back to the town(Event 1), and start over. It will still be a continuous cycle so long as you DO NOT finish the wave quest.
Also, while during the Invictus Castrum bar fill up quest(Not the waves one), kill Fire Imps while you wait. I'm getting about 350 exp a kill with bonus.