Using DamageAV("Health", 2000.0) does not kill some actors, neither does Kill, KillEssential

Example lets take Alvar in Riverwood, using DamageAV on him to instantly kill, or if you make a script that will do damage over time spell like... he will just sit there staggered and will get back up.

Now in the Actors list, he is not considered a essential, nor is he considered a essential in the console window, anyone have any ideas?

DamageAV works on other npcs... just some it doesnt

Look into Quest Aliases. You can set Actors to be essential from there. That might be what's messing with DamageAV and the console commands.