Ew, it kinda suck you got that kind of guy in your party, nice job on easing up the tension ^^
Many can't pull it off and remain frustrated due to guys like that, if someone does something that oppresses you or many, don't be afraid to speak up and make em shut their mouth!

Elim, you know, the only way I found to make this game somewhat more difficult and enjoyable is to just react, not trying to learn beforehand nor learn the boss's rotation, just react.
I know all of their attack but never bothered learning their pattern after I realized how easy it makes it, turns out I still get hit or die rarely (I use to be a dragoon before I switched server and went war) and when I do I know why and don't make the same mistake twice (except when it's due to latency or me doing some weird shit like running right into the aoe instead of running away, it don't know why myself xD)
Each of us have their own play style, you can't force one on the others.