I'm a 60 Shaman.
My only advice is if you are trying to pick the most powerful race, don't pick Barb.
Frontal Stun immunity > Regen @ 60 with torpor for soloing hard camps. The first 59 levels you are at a disadvantage, and the stun immunity doesn't change who can solo what (as you can see the best shamans in the Solo Artist Challenge aren't even Ogres).
Regen > Frontal Stun Immunity in groups since you can convert hp to mana.
Iksar can't wear JBB. Not a huge deal, nowhere near as OP as epic clicky.
Trolls worshipping Inny get access to a snare clicky neck.
http://wiki.project1999.com/Regent_Symbol_of_Innoruuk
It's pretty good especially since Shamans never get snare.
At the end of the day I picked Troll and haven't regretted it.