So how did they do necro charm on blue?

[Dolalin]

Necromancers had the charm (anything) line at launch. It was nerfed in one of the summer patches.

NECROS
- Fixed bug that caused lifetap spells to be unresistable
+ Some Lifetap Spells Made more mana efficient
+ Added more Class Specific Quests
+ Added more Class Specific Items
+ Necromancer Pet Buff Spells Strengthened
+ Added Special Items to let Necromancers Summon Stronger Pets
+ Lots of New Spells (c.f. Screaming Terror, Pact of Shadow,Vampiric Curse, Bond of Death, Summon Corpse, etc.)
+ Enhanced Call of Bones Series
+ Enhanced Screaming Terror
- Added a Recast Time to Pact of Shadow
+ Added New Looks to Necromancer Pets
- Removed Charm Series
+ Reduced the Casting Time of Some Necromancer Spells
+ Made Research Easier & Fixed Broken Research
+ Added Quests to let Necromancers Quest (instead of Research) their pets
+ Enhanced Effectiveness of Some Spells (Shadow Vortex, Surge of Enfeeblement, Ignite Bones, Dead Man Floating, etc.)
+ Feign Death: Changed to be more effective for creatures under 32
- Feign Death: Is slightly less effective (once experienced) for creatures over 32
+ Slowing component of upgrades to the "Darkness" series increased greatly.
+ Dooming Darkness and above changed to override Snare
+ Slowing component removed from Ignite Bones
+ Appearance changed for higher level pets
+ Levitation component added to Dead Man Floating