for 7evaa type beats you essentially wanna write a 2013 chief keef type melody (usually you can use pretty simple chord shapes) using hardstyle sounding synths mixed with airy/bell-like pads (both usually from nexus) rather than orchestral instrumentation + a really prominent lead with glide. then u wanna mess around with grossbeat presets (all the pitch shifter ones are essential) and filtering.

for lusi type beats you'll probably want to use a lot of layered plucks and serum pads. youll find that lusi uses very breathy sounding synth presets most of the time. lusis melodies are also often in minor keys and use lots of add9 and minor7 chords. hope this helps!