Questions about Necro Undead Charming

[Encroaching Death]

My Necro is currently 55. I've been root-rotting 99% of what I've been killing since 49.

I'm looking to master undead charming, but I've maybe only tried it once or twice.

I've heard about reverse charming, conga line charming, etc.

I know the classic technique of rooting the mob your charmed pet is fighting and trying to keep them both even health, and then using your CoS to break charm at 5% HP.

I suppose my question(s) really is: What tools do Necros use to achieve all of this? What useful spells do you keep memmed? I imagine Screaming Terror, Lulls, IVU are some key ones? How do you manage to keep mobs equal health? Heal your pet with Shadowbond? What if your pet is overpowering the mob? Heal the mob? Lol

Thanks