As a bard main you start to have an internal timer for your dots. So even when the game bugs out and doesn't show your dots on the boss you can still keep them up all the time. It's not really much about watching your dot timers and more about figuring out where you will be when you need to refresh them in 18s, some for flaming arrow(do you pop it on CD or do you know the boss will be moved in the next 30s and thus waste a part of it). Each job has such issues to deal with in one way or another.