No hard and fast rule for frequency slotting. Basically it varies with the players, the instruments, production values and goals... I personally start with the kick and the drummer. Fast feet, busy kick, well tuned drum, I tend to EQ is a little high and punchy, I'll slot the bass lower and play less. Busy bass guy, drummer is kicking 4's ? The drum goes deep, the bass less so... None of which really helps as the salient point here is... You gotta use your ears. Period... It's your band after all...
With electronic drums, selecting the right dum sample is a great place to start. Mostly it's about the guys foot IMO...
I refer to the above as slotting as it is a concept that illustrates a point. In reality, I'm just mucking about with the EQ and emphasizing/de-emphasizing certain regions. Actual slotting requires dedicated low pass and hi pass filters and possible a number of them per instrument... In a live sound environment that isn't usually available to us unless we happen to own some really serious console. Something far more capable than my Studio live anyway...