Hag Coven Spell List

1st level (4 slots): identify, speak with animals
2nd level (3 slots): gentle repose, detect thoughts, hold person
3rd level (3 slots): animate dead, speak with dead
4th level (3 slots): divination (ritual), polymorph
5th level (2 slots): geas, raise dead
6th level (1 slot): circle of death

Note that hag coven spells can only be cast when all three members of the hag coven are within 30 feet of one another.  This guided my spell selection.  Most likely, the hags would be encountered together in their lair.  The lair intentionally is 30 feet in diameter; cramped, but for a very good purpose.

The spell list includes three offensive spells:  hold person, polymorph, and circle of death.  Potentially, each hag could cast one of these offensive spells during the first round of combat.

The speak with animals spell would be used on ravens that are trained to scout and spy.

The gentle repose spell would be used on a dead person brought to the hags by someone wanting the hags to restore the dead person to life.  The hags would demand a service in return, giving the person up to 10 days (the duration of the gentle repose spell) to complete.  Upon completion, the hags would fulfill their bargain by casting raise dead on the dead person.  If the person fails to fulfill the service, the hags animate the dead person's corpse, commanding the zombie to return to the village as a warning to others.

In furtherance of this sort of leverage, hags endeavor to remove--or have removed--from the local village(s) any person capable of restoring life.

When negotiating, one hag casts detect thoughts on the person negotiating with the hags.

The target of the geas spell could willingly fail its saving throw.  Hags usually will coerce the target into agreeing to fail this saving throw.

The circle of death spell is very effective against the stereotypical village mob brandishing torches and pitchforks.

As known purveyors of information, hags will use the divination, speak with dead and/or identify spells when they are approached by people seeking answers.