SSBU/Lucas/Techniques

Tap Jump Buffered Full Hop UAir
Lucas normally has to use full hop in very specific cases for Uair but with tap jump you can confirm a into a  loop which deals a great deal of damage. It is not as heavily recommended as using Tilt stick controls for Lucas but Tap Jump gives you easier access to your strings from a full hop among other things and this makes routes not normally possible without being frame tight more doable in practice.

Instant Double Jump
Lucas unlike other double jump users has a slower rising double jump so buffering it from a jumpsquat can help with reaching your opponent for a trap or string but in some cases full hop is a lot quicker if you can afford to use platforms. Instant double jump is most effectively used with, and

Pivot Cancel
Pivot Canceling is when a character pivots in the other direction during a dash, and then uses a tilt in the direction they were dashing. If done correctly, the character should slide forward a bit during their tilt. Lucas having one of the safest and most versatile  in the game means that you will be using pivot cancel tilts. Because of this, tilt stick is recommended heavily for Lucas.