I agree completely. I don't think it's a cheese. I actually think it's harder to leave the ogres alive for longer. I beat it with all 3 of my characters and each time we killed the ogres as fast as possible and sniped the knights. The last ogre and knight are the most difficult to deal with as you have less time, but a good team will deal with them efficiently as well. On my hunter, I tethered the fourth ogre when I was the floater (4th platform), to help deal with it in the reduced amount of time. What our group found was super helpful was having a Titan up top with blessing of light and ToM. That right there was truly the game changer. Also that titan up top, or floater can easily snipe the last knight. It's a very fun battle, but challenging without a good team.