Best race for shaman and why?

[Lhancelot]

Is ogre frontal stun immunity superior? If so, why and in what situations?

Is troll or iksar regen superior? If so, how much better is regen in later levels and does a fungi nullify the usefulness of the additional racial regen?

Is the jbb so useful it should be considered when choosing a race for shaman?

I really just want to hear people's opinions on this topic, I am sure it's been discussed in the past but I have not read anything on this topic recently since velious has come out.