[Shodo]

The mobs should be fleeing when you break charm (i.e. get them under 10-15%), so if you have mana issues just snare the uncharmed one before breaking. When the mobs get far enough apart they'll stop chasing and flee, so you can just finish off with melee. Even a 50p 1hb will do the job in a few swings. Depending on how long it takes it might be better to just nuke and med, but for very low health mobs meleeing can save you a lot of mana.