The best algorithm to cover all that would be TremoloPan. Set the rate in SPEED, with a square SHAPE. DEPTH & WIDTH to maximum. Secondary MOD SOURCE to ENV; SENSITIVITY to taste. As far as bringing it to a full stop, you’d have to experiment with 10X slower [SLOW / FAST toggle], and adjust your initial SPEED value.
The Harmadillo algorithm might be more straightforward, with an integrated ENV RATE setting. X-OVER to 12,000 Hz. for a standard tremolo. But you’re going to lose the WIDTH (panning). I suppose you could fake a tremolo with staccato input and a couple of panning delay taps [for example, UltraTap]. Adjust the SPREAD for a slow-down effect.
If you get stuck, I may be able to post a few starter example.