Looking for the best heroic halfling thf barbarian tr build

Build inquisitive, grab the THF feat, never use it. You have a few more days for that.

Doing halfling just for fun?

Max Strength, Con, I like points in Int because by pretending that I ever use Search it helps me break up the endless nightmare of playing this game

Then do whatever fighting style you like, the changes to THF will definitely do something and if they're good you're welcome and if they're bad not my fault

It's a Barb, the entire skill ceiling will be based on your ability to chip away at crowds and manage HP while soloing, which actually Barb does quite well on low Reapers thanks to temp HP spam and non-penalized blood fuel healing thing. T5 Ravager, check the wiki