Bard swarming pre 54 and post 54

[MikeXG]

I know swarming is a huge part of the Bards toolkit and often how many of them solo. I never really fell into this playstyle when leveling, I usually had a duo partner or grouped with friends. If I soloed on bard I wouldn't ever really be in the mood to swarm kite for a while, so it is a part of the bard I never really developed. At 54 bards get that awesome AOE snare - is it safe to assume post 54 when a bard refers to "swarming" that they use this method instead of the circle and strafe get the dot to tic when the mobs are in lower corner etc? What are the specific mechanics when using the snare song. Just keep walking backwards making sure you are in range of songs? Still do the circle trick, just easier with snare etc? High end newb question, I know.......

Thanks