How do you beat Branka and golems?

Basically you need to have someone tank Branka while you take out the golems. Once Branka gets down in health a bit and starts running for the lyrium streams, cast Force Field on her to put her on timeout. Finish off the golems and have your followers suck up the lyrium streams in the room.

Where is Branka in Dragon Age Origins?

Anvil of the Void
Entering the Deep Roads. Anvil of the Void is the next sub-quest. As though clearing out the Carta wasn’t enough, the Warden must then complete a third task: to go into the Deep Roads and find the Paragon Branka.

Where is Oghren Dragon Age Origins?

Oghren, like the other heroes, appears as a boss, and is encountered in the Denerim Market District accompanied by four violent drunks.