I can't see any use for this charms, specially for mages.
Since you are a mage, you can attack from distance using spells/runes, therefore, is not a big deal creature walking away from you. Those runes would be more useful for a knight, who has to chase creatures that stay on distance.
I would leave those as last options on charms, and go straight to damage runes, which will actually make a difference on hunts. Cripple/Numb will change absolutely nothing for you