TIL that Neptulon will solo Ozumat in Throne of the Tides if you let him

Was trying to get an achievement on my 110 tank. Accidentally killed the unyielding mob and thought another one might spawn during the Ozumat encounter. I got up to ~250 stacks and Neptulon solo'd Ozumat down to ~10% HP, Ozumat ran away and I was able to loot the cache at the end.TIL!