1.) The other sections require a lot more description if you plan on doing it legit, not cheesing. Deathsinger doesn't have a cheese to simplify aside from getting wizards to come out without the need of luring them out. 2.) The deathsong is 3 minutes long. If you don't start the deathsong right away by avoiding fire from and to the enemies in the courtyard below Ir Yut, you can kill both wizards without worry of the 3 minute timer. Once you want to kill shriekers though, you must start the deathsong. Done properly, you can get more than enough time to kill Ir Yut, even without the 30 second to hold her stil. 3.) After Ir Yut is dead, phase doesn't end. You have to kill nearly every knight in order to end the phase, so even if you do start the deathsong right away and finish in 3 minutes, that doesn't mean you finished phase. Those knights will still take a full team of 32s a minute or two to kill them all. So tops 5 minutes, yes. 4.) Like I said, reward or not, it's the fastest and most simple section in all of Crota's End. To my team, it's simply a walk through and not worth our time to find a Crota CP.