The advantage of user phasor~ driven cycle~s (or any other waveform, for that matter), as Roman says, is that you can sync them using rate~, and keep their phases & frequencies relative.
This includes using the global transport (eg.
) so that your LFO’s etc. can all be driven from a central phasor~, which will also keep sync with non-signal events , ie. metro etc.
More fun than a barrel o’ monkeys!