Solo duties aren't about "doing your rotation", they're about paying attention to the battle and reacting appropriately while doing a very dumbed-down rotation.
What mechanics are you even seeing "for the first time" in a solo duty? The orange puddles on the ground have been there since day 1.
I guess the Gulool Ja Ja fight had some unique mechanics, but they never insta-kill you. You're supposed to get hit, go "oh that's how that goes", and learn for next time.