The topic's somewhat old now but... I agree with many others. The CT "raids" are not really raids anymore; nor are the void ark or even the ivalice ones. The mechanics are pretty braindead and simply require you to do little more than look at the bosses' tells. Honestly holminster switch is a harder dungeon than most those raids and that's more or less immediately after the ivalice ones.
The only exception I'll give is the math one since, well. A lot of people don't do good at doing math on the spot... as simple as the math is.