I have noticed escpially from my frieends list that A LOT of people are getting stuck with this quest but what i did was i used matchmaking and i was matched with 2 other Ttians (myself being a Titan also) so i suggested to the team to use the Bubble strategy orbs everywhere! Ok the thing is you have to ONLY keep that one knight that matches the element of your sword as weak as possible (Dont kill the knight when it spawns) (for my team there were 2 people that had solar swords and 1 player who had a void sword) so for my fight we had to keep TWO knights alive plus the boss himself, we killed the Arc knight as soon as it spawned because no one had the arc sword so no arc quest in the team.. you only keep the knights that are listed in your quest alive but weak because the quest tells you the knight with the element AND the boss need to be killed within 30 seconds Tried to include the way to beating the boss and getting the quest in the video, you can see i made the solar knight as weak as possible (since i have a solar sword so i got a solar quest which means my target was the solar Knight), we defeated the knights and then quickly killed the boss as long as they are all killed within 30 seconds you'll get it done. Also since my target was the solar knight (solar knight is the most annoying knight of them all due to its long range attack AND burning the ground with lava) so my teammate tried to ALWAYS blind the solar knight with blinding bubble to keep him off shooting us and confused)