dudutsai
Smash Lord
If you use it more than once it will be read by a good player, and you will be punished accordinglywhat about using pound to get back to the stage from the ledge?
If Marth he grabs you, he can choose to fthrow or dthrow, both of which he can tipper into depending on which way you DI and if he wavedashes. Once you get grabbed just choose one way to DI and hope it works. Try not to get grabbed
If you're playing a Marth who likes spacing fairs (most good Marths do this vs puff) then do the Mango strategy, which owns the crap out of those Marths
How to space:
If he in range to hit you, get out
If he delays himself with a move/wavedash/anything hit him and back out
If you can sneak in an attack then do so and get out