Possible use for lullaby at L17...

A friend on his L17 Bard, and I on my 19 shaman were in East Karana
killing gnoll reavers and undead reavers. He'd go pull 2-4 and come
back. He'd use lullaby to keep them all asleep except for the one he was
attacking. The paladin with us used /assist to target the correct
target, then tanked it. At the beginning of the fight, I AE'd the mobs
with Infectious Cloud, a Disease AE DoT. Next pulse he'd put them right
back to sleep, nixing me off the hate list so I could heal or med
without being mobbed. By the time the first target was dead, the other
2-3 targets would have been chewed to half health by the AE everytime.
It was quite a sight.

Two things to keep in mind however, his stats were much higher than a
new player on a L17 because he was outfitted with better equipment, and
he'd also played with many bards all the way to L50 in group on his
primary character, so he'd been able to see Bards in action and ask many
questions about the techniques and tricks of others.

Ariell Thunderwolf, Karana