Those are designed with 4 tanks, 3 healers, and a bunch of DPS in mind.
These are solely for Blue Mage. There's only one way do to mechanics. Many of which you need memorization for the one way to do them. I have fun doing raids with other people, even when dying. We learn and keep moving. In the Carnivale I keep dying to the same mechanic over, and over, and over. If you lag in any other content, there's other people to back you up so you can keep going longer. If you lag in this (Internet or mentally) at any key moment, you're screwed in every literal meaning of the word. There are many times that if you attack, you won't have enough time to use your interrupt as Blu, which will 100% kill you every single time.