I didn't try to do it like that, so it will be interesting to see what comes out, keep us posted :)
Here are my believes on that : By cutting wedge you are exposing more internal wood to rot, pests and dehydration.
I read some people do wax those wounds to avoid dehydration and pests entry .
Figtree cuttings do root in portions of the cutting where all the bark is still there - as long as the bark does not rot - you don't need to take some bark out to help them root.
A small test for you and the others : If on one of your trees in the growing season, you put dirt against the trunk ( 10 cubique cm volume amount in a cube shape ) , you will see roots appearing in a matter of one to two months- That is how I airlayer the suckers that I want to move to a new place.