Charm will break on a Bard kiting with Fade, or an invis clicky , the advantage is to using an invis clicky is it will break and then the previous charmed pet will still pursue you even after you charm another mob and send it after it.
Please message me eqemu devs to work with you on the dynamics of bard charm kiting in EQ since I have been doing it forever on live.
Mortenson
www.raidaddicts.org