General Actions:
Request was halfing barbarian similar to Nut in order to be able to contrast the differences. Halfling has small synergy with Barbarian, as Charisma is a secondary stat for Thaneborn barbarians. Strength is primary, Con is also important. Dex is cheapest given the halfling racial +2. For the future always raise Strength and decide whether Dex (if you want blades), Con (for hp, powers and axes) or Charisma (for powers). Barbarian powers focus on dealing damage and great mobility. Spears sadly suck, so Nuts favourite weapon isn't really optimal.
The halfling racial dodge ability should help with getting to the backlines to pick on the enemy artillery if that's what's required. One-on-one you can do the most damage of anyone in the party. Look for feats that favour mobilty, dodging and increasing damage.
I've multi-classed you into Ranger to pick up some stealth. With your high Dex you are the best sneak the party has. The extra damage once an encounter from Hunters Quarry doesn't hurt either. The Cat Burglar background grants you some thievery and a small bonus to athletics (which is used to resist grapples).
The Hrulla Tower in Jarrak City? I've been in and out of there three times. The ivy on the courtyard walls is pretty much a "Please Steal From Me" sign.
You take an artisan's approach to large-scale burglary, stealing from the most well-protected treasure troves you can find. What particularly notable items have you stolen, and what did you do with the proceeds? Did you work alone or as part of a gang? If you worked with others, what do they think of you now? Did you ever get caught?