I haven't read all the recent Lucas discussion here so I might be bringing up points already covered, apologies in advance.
For some reason these last couple of days something just clicked in me and I've been able to extend combos, whereas before I wouldn't at all nearly - I think it's a combination of me playing a little ZSS and also realizing I should use FAir more. Among other things I found myself doing DJC PKF -> grounded magnet -> wavedash back -> (DJC) BAir a couple of times. I suspect this has limited usage however, given that the distance of the wavedash back needs to correspond to the magnet knockback.
Also, I've been practising grounded magnet to DJC aerials, mostly FAir, quite a lot. I can get it most of the time, but again magnet knockback often proves to be a problem. Grounded magnet to rising aerial sometimes works, depending on the magnet knockback. FAir -> DJC mag with significant knockback from magnet might avoid the problem of extending the combo, but it seems to me to be slower than vice versa, although maybe that's just because I'm not as used to it? IDK.
Also, I seem to be doing rising aerials when I try and do aerial magnet to DJC, or if not rising aerials than at least aerials at a significant height. Is it possible to get them closer to the ground or is the combo only limited to usage when the opponents at that specific height in the air?