I use a strata shader and then a redirect shader in the Terrain Tab. Use billows noise for the redirect's power fractal. The power fractals scales should be the strata scales divided by the the octave number. So, it would be 50/8 and 200/8 for the scale and lead in scale of the power fractal. I make the strata scales larger than the defaults. Measure the height of the cliff, divide this by 4 or 6. It will give the replacement for the default 50. I keep the second scale of the strata 4x the new number replacing the 50 default value. I hope this makes sense.
Now add a displacement shader with lateral selected. Input a power fractal, also with lateral displacement. You'll need a compute normal. For the scales, I just input numbers until it 'looks' right in the test renders.
