I personally like to have at least one element hitting at the same time that the kick/snare do (and I also make sure it's sidechained). It adds a bit rhythmically, and you can do whatever you want between drum hits. Also, take your snare sample. reverse it and cut the end off (to taste, depending on how loud you want the end of the swish to be before the snare hits). With a touch of verb, you'll get that nice breathy snare. Another tip, and VR talks about this in one of his videos, a great way to layer chords is to have a synth running (mostly?) in mono, and a really wide synth. He uses the JP6K plugin by Adam Szabo (a really beautiful plugin) for the wide chords, but you can achieve the same results with massive. Lastly, you can design a bassy synth hit with a single wave (I can't remember which type emulates a snare the best) that matches the snare (with ADSR) and add pitch modulation. Your snare will punch super hard, and you don't have to worry about it interfering with your kick because they never hit at the same time.
