I've always used somewhat of a Hybrid between your rotation and the other thread's rotation either. Using the other thread's rotation as the normal one, yet breaking into yours depending on party composition/fightphase/enemies hp/mechanics currently going off. For example. If you have more piercing damage in your party in a coil run, and wanna get that 10% piercing bonus up for the other bards faster, while stacking your dots so they can be ticking down on one mob while you move onto the next target like in Turn 4.