The kick in EDM does double duty: it defines the rhythm AND clears spectral space for the bass and lead synth via side-chain compression. When the kick hits, every element occupying its frequency band ducks 3-6dB for 100-150ms before recovering. The audible result is the "pumping" that's synonymous with EDM. The structural result is that two elements occupy the same frequency without masking each other — the kick takes the on-beat, everything else takes the off-beat. This is the most important compositional-meets-mixing trick in the genre.
Sub-bass in EDM is engineered as a separate layer from the bass synth. The sub (often a sine wave around 30-60Hz) provides club-system weight; the bass synth (sawtooth or square in the 80-200Hz region) provides the harmonic information that translates on earbuds and laptop speakers. They're crossed over carefully — a high-pass at 80-100Hz on the bass synth, low-pass on the sub at the same frequency — to avoid phase cancellation in the overlap zone.
Saturation in electronic music is the answer to the "sterility problem." Pure synthesis lacks the harmonic richness of recorded instruments, and a mix of pure synths can sound brittle or thin. Selective saturation (tape, tube, transistor models) on individual layers and on the master bus introduces harmonic complexity that mimics the warmth of analog recording. Without it, EDM mixes feel like demos; with it, they feel produced.