Honestly? I find T5 to be extremely easy with The Echo, unfortunately, I only just got in to a static recently, so I never got to experience it in it's full effect, but really there just isn't anything that hard about it mechanic wise.

Another person including myself were brand new to the fight, and a few others never fully cleared it, it took us only two days to clear it, first day we spent about 2 or less hours on it, and I'm not sure how many on the second day... but yeah, I had the entire fight down and was completely comfortable in only a few tries, and it was just getting coordinated with the DPS in certain phases that was the only problem.