Managed to solo Niuzao on the timeless isle with a mere 538 ilvl. Used EF due to it healing 200k+ with each tick, even though I didn't have the 4set.
It was pretty nice getting to pre-5.4 200k+ Vengeance levels.
I did make a mistake though, which could've cost me the fight. I almost lost my HP buff due to being out of range when he cast it right after the charge, but luckily he casted it again on 1sec remaining.
I really wasn't organized when I did the kill, I was sorta bored, was already on a low pop server with some of my friends that went offline and thought, why not? Ended up doing it on 1st attempt.
(Gotten a few upgrades since the time of the kill)