The stepper device is in modulation only.
The equivalent to a stepper device on track/dsp level would be an LFO device in custom/points mode with inf speed. Let's call it "table LFO"... You can control its reset with another LFO (or other means), and it will put out only the values you specify as points, when the reset value is within the effect range of the point.
Not sure if I understood right what you are trying to do, but you want the table LFO to control another LFO's speed to match only certain values? That would be problematic, but only because it is very difficult to setup percentage values in the LFO editor to match exact speeds of the second LFO.
If I take a break from mixing tonight I could try to see if I can find a solution with a formula device in between that makes selecting speeds in lines in the table LFO easier, for example a value 12,8 % meaning 128 lines, a value of 6,4% 64 lines etc.