Alright, first let me say that I am confused on what you are saying. You are saying that from the ledge, waveland onto the ground, use a double jump and pull out a bomb and regrab the edge?
I looked up and down this topic looking for a vid. So if its different then what I'm about to talk about I apologize. Now the tactic, doesn't really sound useful. However situational it may be using a double jump near the ledge is very bad. Yes having a bomb in your hand is better than NOT having a bomb in your hand. It is still very hard to recover even with a bomb in your hand. If your at the ledge, your at the ledge. The only way to get back on is to hope the opponent doesn't catch on to whatever tactic your about to use to get back on. With a bomb in your hand however you lower your options since any attack you do with the bomb in your hand will launch the bomb.
Now what I'm trying to understand is when are you using this tech. When your trying to recover, or when your trying to edge gaurd. If you have enough time to pull this tactic off while trying to recover then.....I don't know why your going BACK to the ledge. Now edge gaurding, maybe. There are still better ways to do things.
Just to give you a heads up on any situation you might use this on. If you have enough time to pull out a bomb from what your talking about, its better to get onto the ledge and stay on there. Next thing, using a double jump near the ledge while pulling out the bomb is extremely dangerous. For the fact that Links, invincible frames are really short.
I'll check back later to see if you guys posted anything.