It has to be the easiest cycle during the Sumerian patch set because there is no way I 36-starred it in spite of all my trivial mistakes, like skipping bursts during my rotation, or running a suboptimal team on the second half of the 12th floor's last chamber where I chased the enemies across the arena while my hypercarry's burst was active. Had this been the last Abyss, I would've certainly clocked 4 minutes in the last chamber. I can't complain, though; it was genuinely fun and undoubtedly less stressful than any other Abyss in the past couple months!
Yeah, it's been like this for a while now, although 12-2 and 12-3 are usually much more difficult than this rotation. A few patches back though the hardest chamber was 12-3, it's good that they changed this to 12-1 because it's easier to change teams and try new strategies.