So I'm one of those players who plays exclusively with handguns. Right now my typical setup includes a Mega Magnus, Shadow Alchemer Mk II, and a Cryo Driver.
I want to take another weapon into the Clockworks, either a sword or a bomb. Its main purpose is to act as "backup" when dealing with sticky situations handguns do poorly in; basically, something for more reliable crowd control and breaking lines, and is generally efficient against all enemy types.
I currently have a Freezing Vaporizer Mk II—an amazing weapon for these purposes—but I would like to hear opinions about other gear.
Stay with your vaporizer, take it up to shivermist buster. It will serve you in practically any situation. It's one of the best, if not the best, crowd control weapon in the entire game. It synergizes well with your weapons, and your party will love you for it.