Ok, so this technique is a bit more difficult than using simple soft brush painting but looks more blizz and also nicer in my opinion. When using this technique u should try making it as non-regular as possible.
For this guide im gonna flat raise bout size 52 as bellow:
Next i'm gonna soften it on all sides:
After that i'd give it a ramp-like look so its more interesting:
Now I use 1.00 hard brush with 0.11 pressure and 2.1 size. Now u can use something bigger if u want but it's best u do so. I suggest u paint in 2D view, its much easier. Now try paint something like interlocking stones of different sizes and shapes that warp accordingly to the shape of the cliff by rotating your hand as if drawing fast circles from the core to the edges of each stone insisting gradually more at the core and less at edges. Try creating resting points in the system, like gaps around which the stones warp. See below:
It should look like this in the end:
And in 3D:
Now we start modeling the cliffs. Pick a 11.89 size raise/lower brush with speed 1 - 1.2 linear and start raising each textured stone by 3/4 of its size at top, meaning 1/4 lower than the top and raise it just a bit so it can be seen that it stand in a different row from the one higher or further in front of tehe one that stands above it. Do this for all the stones and flatten with a 11.89 size brush linear type flatten/blur all the gap places. (NOT THE SPACES BETWEEN THE STONES!!!) Try then to lower each stone that u raised by 1/3 distance from bottom so that the spaces between the stones come clear as spaces between those stones. See below:
Try adjust the terrain until it looks natural (try to avoid spaces between stones to be raised. And also u can increase the radius of the raise/lower brush and raise a cliff section whole (linear only). In the end should look like this:
Now remember this is my first guide.