It's not required to coordinate shrieker kills. People have solod that part, I've solod the shriekers themselves at level 30 ( team was killing adds outside while i did it) And unless you die numerous times or are super under leveled the time isn't a factor whatsoever When i say mechanics i mean something to actually do not just kill enemy A Then kill enemy B to kill final enemy C. Mechanics like having to kill oracles during templar or else you get marked and if you get marked use the shield to cleanse. Something other than just a gunfight which gets very boring very quickly