I have a character that I don't really play anymore (Human FvS 14) but that I've invested quite a bit in: Greater Tome of Learning, +2/+3 tomes, BtC gear, etc.
With the update, I'd really like to try a Bbn 18/Rog 2. So I was thinking about using the Lesser Heart to respec this character and then TR so I'll have a past life under my belt.
What are the best past lives for a barbarian? I really want to maximize saves and survivability. For this reason, I was actually thinking about Bard for the +2 on saves vs ench and illusions. Paladin (healing amp) and Fighter are also solid.