you mean besides flamethrower?
Flamethrower honestly isn't that great. It's ez damage/conditioning against the vast majority of the cast and sets up crazy edge guards in certain MUs but you really can do a he|| of a lot better most of the time,
especially at higher percents.
Ledge trumps are really nice in a lot of MUs, barring bad lag. Get a trump and simply do a neutral get up back on to the stage. Take a step if possible and then turn towards the ledge and prepare to hold shield. If they regrab, go for dsmash or fsmash. You will need to start the move earlier for fsmash though. If they try to land with an aerial, shield it and nail them with a good OoS option like Fly or usmash. This hits the vast majority of the cast, if not the entire cast (not sure about super low ledge grabbers like Sheik). You can also go for bair if you think you've caught your opponent by surprise or just want to style but most of your opponents should be mashing second jump if they have any idea how slow Zard's bair is.
You can also do SH nair when their character begins the getup animation to cover a ton of options. This is the easiest thing to do outside of Flamethrower because of how long the hitbox lasts. The tail hitbox will beat getup attack. Fade back with it and the very end of it will catch rolls and potentially combo into ftilt depending on DI and percent. Doesn't do anything to people who double jump back on stage but you can still try to fair them after you miss nair if you have better range. Alternatively, you can just shield where they are going to land and hit them with an OoS option. This typically will not catch people doing ledge jumps though. Fair at the ledge to cover everything but rolls if you time it right.
Choose between a pretty much guaranteed couple of percent at the ledge with Flamethrower or go for something harder but way more rewarding. You do more damage and you keep them on the ledge if you are successful. Flamethrower is a pretty much guaranteed few percent but then your opponent gets to neutral after