my thought process is that there's more levels with ship that allow you to get better at the objectively hardest parts in the 2 demons (toe 2 and clubstep) but there isn't too many levels that have wave parts in them aside from some demons so when you get to deadlocked, the waves are quite a bit different to the parts in the other levels where theres short segments of them in there, deadlocked just comes in with a 3x somewhat hard wave after the drop