A final steps of fate run I was in did a vote abandon after a few wipes but I felt it was warranted. Our group kept wiping at the same spot because the dps just wasn't high enough to kill the 3 adds before the knock back. After a few wipes at that same spot it was clear that the group just didn't have the dps to clear the encounter. It wouldn't have made sense to just mindlessly keep ramming our head into it till the timer ran out.