An example of a system for delivering neurostimulation may include a display and an interface control circuit. The interface control circuit may be configured to define a stimulation waveform according to which the neurostimulation is delivered. The stimulation waveform is defined by waveform parameters including one or more user-adjustable parameters. The interface control circuit may include a parameter selector, an effect analyzer, and a parameter generator. The parameter selector may be configured to present values for each user-adjustable parameter on the display and allow the user to select a value for each user-adjustable parameter from the presented values. The effect analyzer may be configured to estimate an interactive effect of different stimuli of the neurostimulation. The parameter generator may be configured to select a rate rule based on the estimated interactive effect and to generate the values for each user-adjustable parameter according to the selected rate rule.