So, in our current age of highly limited EPs, I would hate to blow edge points on shitty edges, which seem to litter the Shifter's class list. In light of that, any answers you can provide to the following are greatly appreciated.

Enlivening Adept/Master: Are these worth it? Does it only increase duration of enlivens (which are already half mana for half the duration), or does it have other effects that it strengthens? Spell level for warding off dispel? If enlivens are half the mana for half the duration, as the duration increases per edge, does the mana cost increase as well?

Go for the Throat/Bloody Pecker/Tearing Jaws: Any ideas on the rate for these to fire pre and post edge?

Are there really any must have shifter class edges? I see alot of past comments for Ricochet Skin/Poison & Disease resist if you have applicable forms. Any others or thoughts?

Any General edges really beneficial to a shifter?