
downerbeautiful |

Most likely knowing the answer to this question, is there a way to recover rounds of rage like casters recover spells with pearls?
I'm looking for items I may have overlooked, not powers/feats/traits, as I tend to run out of rage when the barbarian goes through a module.
Failing a way to recover rounds via a potion or what have you, how do rage potions work? I understand the bonus it provides, but what does "Duration concentration + 1 round/level (D)" mean in terms of a potion? Please be nice on that last bit, casting is not my forte.

Claxon |

Well, the elemental kin archetype allows you to restore rounds of rage when you take energy damage. Though you don't seem interested in that sort of ability.
Barring that, there is no way to restore rounds of rage that I'm aware of that aren't feats or rage powers.
A potion of rage will only give you a +2 to Strength and Con. It will not scale like your Barbarian's rage, making it very limited usefulness. A duration of concentration + 1 round/level means it last for as long as you concentrate and for 1 round per caster level. Concentration requires a standard action, so you can't actually do anything useful (i.e. attack) while concentrating. Since potions are made at minimum caster level for the spell a potion of rage will last for 5 rounds.

Claxon |

Destroyers blessing iirc. Carry a ton of daggers and have a buddy hold them while you sunder them. Tad cheesy though.
Destroyer's Blessing requires you be an Orc or Half-Orc and to worship Rovagug. And it is pretty cheesy, and unlikely to be allowed to function outside of combat by good GMs.