Necro charm killing, what spells?

[Widan]

I'm aware of the general method of charm killing at 54+: charm a pet, root some mobs to attack pet, CoS break charm, root/tap pet down, recharm new pet. I'm just not sure if there is anything I'm overlooking. General spell bar should look like:

Root
Charm
Tap
Lich
FD


What would you use for the last 3 spells? Manaskin probably to add an hp buffer, though you can always just mem this in between? Undead nuke maybe incase you need to burst something down?