Newbie enchanter questions

[bwe]

I have a new level 19 enchanter and I'm really loving it. A few questions:

After breaking charm, is it better to kill your former pet and/or its target with a nuke like Sanity Warp or a dot like Choke? The dot is more mana efficient but takes longer...

What is the radius on our PBAOE stuns? I'm hunting in the tunnels of Kurn's and I'm not KOS to the badgers. Don't want to stun one and lose faction.

Also, should Minor Illusion make me indifferent to all (so I can AFK)? It doesn't seem to work for me.