If you get a good group who has their stuff together, and you know the stuff and the tricks, and memorize the patterns bosses provide you, most of the content runs smoothly. You're still fighting on the edge of your seat; positioning and correct skill timing is still important. You need a Paladin offtaking Ifrit or your meter won't go very high and people have to dodge Eruptions; you need a caster to blow Meteor on the Nails. Some of these things you have to aim for, and not having them makes the content harder. Garuda gives you a priority system for dodging behind rocks and defeating certain adds. Titan is a royal pain, until you know his system. Learning this is hard; mastering it is very hard for most people.