yup, rolling off bass on the kik for sure - go for a mid thump, and let the actual bassline bass create the sub-bass attack of the kik/bass combi - try this -
get a pair of gates, send the kik drum to the RTIGGER input of the say L gate
send the BASS to the gate with the the assigned trigger
now the bassline only comes EXACTLY when the kik-drum 'kik's' - this helps to titen up the start makes it more punchy - and invest in a BBE 322 - THUMP!!! - but obviously works only where a bassline follows a kik drum pattern, but it creates huge booming sub-bass kiks tho -
also try splitting & sending the hats hard L/R to open out the track center - t this also works ESP well with BV's in RnB hip-hop - thin the vocals group, and pan L/r with some Bv sent to a delay... a VERY short delay, ... pan the delay return of the BV mix Left... & the original BV channels Right or vica-versa.... then tweak the delay to produce medium mod-depth, and low rate of modulation - to get a smooth across the speakers cutting BV fine-chorus sound
also try compress the lot in stereo, and also duck the stereo BV's with a fast-ISH attack just a FRACTION with the main vox as the trigger... Use that where the vox cuts across BV's alot... as it does, the BV's reduce a fraction, and not all at once - over say 100ms (or try it immeadiate, but duck it only a slightest fraction for realism, more for fx...
you can also try a graphic or notch filter to take out the sub-bass at the freekwency where the kik stops - to me a kik THUMPS me in the guts, but not in the balls, the bass is the one that smacks me in the nuts - that explains it to me best in terms of where each one sits