Empire of Sin

Goldie has a very powerful boss ability: “Killer Queen.” This involves triple rifle shots (rifle not required) for very high dmg and the shots can pass through enemies in a straight line. Combine this with the “Chain kill” from your ability tree, and she’s a wrecking ball.
I highly recommend using Goldie on your 2nd or 3rd play through, for the “Lone Wolf” and “Bullet Proof” achievements, just don’t recruit any gangsters (solo win).