Jerodak
Smash Lord
It's when your opponent goes low after the trump and you know they must grab the ledge, you can simply get up and start charging as long as their recovery can't hit you. Dsmash hits on the ledge, so it's not a terrible option. It can also hit certain characters trying to jump over you. It can even beat attempts to hit you if the attack isn't disjointed since they have to stick thier arm or led past a large disjoint before they can reach Bowser unless they are able to come in from directly above. It's not the best option of course, but it is an available option to us so I posted it.What Jay said.
Although now I don't get why Jerodak is saying ledgetrump to dsmash....
Which options you go for will depend largely on the character you're fighting, some characters will never fall for the down smash, so you'll need to use something else. However, if you see them going low after the trump then you can be pretty sure that the down smash will work, short hop dair would work too though, I'd recommend that instead for characters that can hit you away from the ledge while recovering.
Also, I still kinda like down smash and want to find some uses for it.