Hey I like cargo Dthrow.
Cargo Dthrow is probably the most broken thing vs Falcon/Sheik/bad recoveries.
They are forced to double jump + Up B no matter what, even at 0% because the knockback is set, so you can just continue to harass them. Same story goes with Fox/Falco but they are soo fast and tricky. RockCrock is a good example, tried it on Colbol's Fox, almost got the kill, but Fox is too damn tricky.
From 0%, you can grab a Falcon or Sheik, take em to the edge, cargo dthrow, grab the edge, and watch as they are forced to double jump + Up B (sheik can air dodge) onto the stage and land right in front of you, just to get regrabbed, aerial'd, whatever.
Against characters with Up B moves that are basically only upwards (Mario, Marth, etc.), you can just ledge drop into an Up B when you grab the edge after a cargo dthrow. You can just do it over and over till they eventually die (assuming you start this at bascially 0%).
Keep in mind you need to turn around and wavedash back to grab the edge as fast as possible after you throw, or else sheik will catch on with a quick DJ F-air.