Ways to gain additional rage/day?

[SangoProduction]

I'm wanting to get in to Firestorm Berserker. But, to do so through raw barbarian levels will take a while. Extra Rage instantly gives me enough rages to enter. But, are there any other ways? Kinda feat starved.

Also, BAB. Is there any way to cheat that requirement?

[Uncle Pine]

To bypass the BAB restriction, a Cleric could cast Divine Power on you through any of various means (spellblade, Spellguard of Silverymoon, etc.) before leveling up.
Another way you can accomplish this without permanently increasing your ECL is contracting lycanthropy and then getting cured.

[Dr_Dinosaur]

Do note that you'll only benefit from the PrC's abilities when your BAB is high enough

[SangoProduction]

Do note that you'll only benefit from the PrC's abilities when your BAB is high enough

Yeah. That was the intent.