Yeah it's a total mess at lv60, but in general use WM, Straits shot, Dots, sidewinder, and Empyrial arrow with barrage while activating buffs and procs in between skills. This is a mess because it can leave players little time to pay attention to your party, but try to remember to look at your party's composition for offensive castors when using foe because it doesn't effect all job types. You really don't have to stick to the formula strictly to perform moderately well as a bard, but everyone wants players to be top raiders in terms of skill for some reason with speed running and stuff. It's so annoying.