I really like the Custom Dualies Squelcher and i main them since it was relased. While it needs a good prediction (a miscalculated or reckless action can cost the match), the set and the good range and versatility makes the weapon a well suited swiss army knife for support roles.
Edit: I added Object Shredder with some ink recovery up to keep the tank filled and quickly adjust. I also followed a friend's advice and put a pure of main power up. Now i understand why i so used these days, it allows a lot of trades or safe kills. Sure, my freshness was found by Iso Padre once the shirt was done but... it was a worth trade.
Even with a power boost, remember that you aren't a full offensive weapon but more an offensive supporter. You need to balance between defensive movements and offensive pressure. Keep an eye on the field and if needed stop a second in safety to pick the right move.