I usually only pick Heir with Bards and Thieves, sometimes with Mindcrafters. For my Healers I strongly prefer a True Berserk opening and the Monk's gift would need more PV to be interesting.
I also really like the gift that has been introduced for Mist elven Necromancers, although it actually makes the game harder playing a caster without shield. It's just very stylish.
gremlin - karmic lizard, dark orc, acid vortex, staring eye - dragon turtle, fairy dragon, ogre lord, minotaur emperor - pit viper, orc butcher - greater mimic, dark elven wizard, carrion crawler, dwarven child - imp - ochre jelly, dark elven archer, king cobra, goodwife - kobold shaman, magebane eye, floating eye, quickling king - giant centipede, hill orc sergeant, mimic hivemind, greater claw bug, brown bear, large gnoll - giant bee queen, giant ant warrior, shadow centipede, kobold