I'm making a Barbarian/Frenzied Berserker. The only problem is that while using Frenzy and Rage together, I get a -4 to AC. As such, I made the choice to ignore AC and look for other ways of reducing damage/not getting hit/getting health back. So far I have the invulnerable rager variant, Thick Skinned Feat from a 3.5 book the DM has approved (+2 to existing form of damage reduction), the Damage Reduction Rage Power, magic items for blur, a vampiric weapon (extra 1d6 damage which gets converted into health), and maybe a magic item for greater infernal healing. Any other suggestions?