Thought I've seen some necros soloing WW dragons just doing traditional fear kiting.

Correct. SKs can do it as well. Ya just bring em to water.

I think Yeldema and Gefala are the only two static fearables. The other fearables are part of the Myga cycles.

If you have Kael faction they are decent loot, mostly for the dragon head quests. Sometimes the spells sell but there's not a ton of demand. They can drop 4-necks which are mostly worthless, especially given their 7 minutes corpse. My experience killing them is on a bard, but Sarleon posted a necro Gefala kill on youtube.

You can drag an undead mob out from behind the crypt door if you want to do some kind of camp in seb.

One undead mob doesn't get you very far if you're not duoing with a cleric.

sure it does (if you want it to)

calm, break w/ ivu, root/snare (can skip this if you're near undead mobs spawn point), FD

pet goes back to full hp, recharm