To some extent raids are memory games when you've gotten to the point you've described. My favorite part comes before that. I raid blind and I love figuring out mechanics and devising strategies. But once you have the strategy basically sealed, it's a case of remaining focused and enacting plans one after the other while maintaining uptime. If there was all the time in the world for a mechanic, it would simply be a memory game, but there's a little more going on.