M3t, I watched your video against the Lucas and I saw some things you could be doing better. You seem to like to come down on him with dairs a lot, which is a good idea sometimes, but it often gets you punished. There's a few ways I try to use this move safely. The best way imo is to wait as long as possible, basically until you're right above their head, to throw out the move. That way it's like you're committing without actually committing. Then you can react to whatever they're doing and throw out the dair, double jump, waveland, bacon, or whatever. The other ways are to try to drift back out of grab range (very hard), cross them up and land behind them, or use your dair in such a way that the move ends right before you land. Besides the dairs, you missed a lot of techs that may have allowed you to escape some of his combos. You could be a bit bolder in your edgeguarding. Just edgehogging Lucas isn't going to work unless he's very far away. Sometimes you could jump out and fair or nair him (you tried a couple times that I saw and whiffed), or stay on the stage and ftilt, dtilt, fsmash, sh nair, or whatever. His up B isn't as threatening as Ness's, so don't be afraid to trade. Most of the time, from what I remember, he was shooting right for the ledge. Try to expect that, and if he does something else, adjust your punish accordingly. The last thing is that you landed with aerials a few times when he was two or three character lengths from you, and he punished you because Lucas is really fast and has a long grab range. Think of him like Fox: he can punish you hard even from a distance if you do something laggy enough. I'm not sure what the best solution is, but I'd try something like just a standard land or landing with bacon.
Edit: Dakpo, I just watched your sets against Oracle and Sethlon. What the heck. How are you so good? Please share some of your vast talent with us lowly G&W scrubs.