Can you guys give me some advise?
I just watched the first match, and then like you said when he had one life left he went into overdrive.
And that happens man. A lot of people usually do really good when they start or when they have one stock left.
Don't let that get to you though, and become so pro that you never let off the gas when you play a match.
Once you made your first stock mistake (SD'd?) he used that momentum and chance to come back to almost win.
The first thing I noticed was you need to DJC PKF moreeee, especially with how much you use it.
Go in the lab and practice it for an hour, and even once you get it down, practice again for another hour.
Practice on your CRT until it gets engraved in your brain into muscle memory.
Learn to pivot grab.
Lucas has a good grab, but in reality he has a crazy good grab.
The pivot grab gives you more grab range, and less cool down with more active grab frames.
You want to use that as much as you can when you do grab.
Going back to PKF, it clanks with nearly any move with a hitbox, so don't rely on it when someone sends a projectile at it and charges right afterwards especially if you have bad spacing after sending it out.
Dash dance more often.
Lucas has a phenomenal dash dance that works great for mix up and can tie into DJC PKF/Pivot grabs when the opponent sends out a dash attack or a SHFFL move.
Don't absorb projectiles.
This isn't one of those better options 100% of the time, but for the most part the same you try to convert off of your PKF into a combo, other players will do the same to you and with the absorption of the projectile you will be left open to get hit as a cross up. I'm not sure against ZSS, but I know against a good Mario or any Mario player for that matter, Z-air beats his projectile, fireball.
Z-air is another great mix up/offense, but be careful with it's spacing.
I'm going to watch the other match now
Okay the camera cut out when watching it, so I'm going to go up until there.
When being combo'd, and realize that Lucas can become combo food with bad, or maybe even with DECENT DI.
Try to Magnet when being combo'd, if you can't airdodge to ledge for a tether.
I see you know how to pivot grab. Don't do standing grabs man
Also don't use DACUS as a gimmick so many times in a match, I know it's so rewarding when you do hit it, but if it doesn't you could be 0-death'd or eat a gimp if you get knocked off stage more easily. I usually use it as a conversion off of DJC PKF rarely, or if it's a platform stage and my opponent has good DI and I can only reach them with that attack when they land/tech on a platform.