NeonApophis
Smash Apprentice
Yeah, multimagnets are definitely worth using. I'm not sure if they're the most efficient method for breaking a shield, but they are very safe. Doing grounded magnet -> aerial magnet -> DJC magnet quickly enough that you land on the ground out of the DJC magnet and can jump cancel immediately is Lucas's safest pressure. They're stuck in shield stun the whole time except for 2 frames before your aerial magnet (due to the time it takes you to jump from the ground). Lucas has a ton of options involving multiple magnets and DJC aerials though, and they can be put together in different ways depending on your technical capabilities or as mixups to stuff your opponents' out of shield options.