It's hard to find a more shy combination than...a stick insect on a mimosa 
I used focus stacking on this image not to increase DOF, but to decrease it...explanation below
For this pic, I was not hunger of DOF, if I want the stick insect and parts of the mimosa to be in focus, I can simply stop down....so....focus stacking is unnecessary?
Below is the same scene @ F11.
It's easy to spot the problem here, the BG is very busy, even my combination of a 150mm lens and a 1.4x extender couldn't provide smooth bokeh.
I'm not sure if others have used this technique before...
I deliberately used a large aperture (F4) to induce diffused BG, focus bracket, and then stacked it.
The good thing is you can control precisely which elements you want to have in focus.
For the first picture, all the leaves were in focus after auto stacking in Zerene stacker, but then I made the leaves OOF, so that it won't draw attention away from the subject.
It also took a much longer editing time than usual, since I had to consider which elements I want sharp, and then retouch it....
Another downside is you have to stack a lot of pictures with minute focus increments, since the DOF @f4 is extremely narrow.
To be honest, the first picture was a failed attempt, the stick insect is very soft, I completely missed the focus on it, and had to apply very heavy sharpening to make it appear sharp.
Anyways, this is one more skill in my bag, and think it has lots of use for natural light macro.
