Do you use parafilm? That is the #1 thing to do to improve your take rate.
I like using rubber electric to hold the grafts together, as it will gradually stretch and doesn’t need to be removed, unlike vinyl electrical tape or green garden tape.
A few years ago, I made some pics of doing bark grafts on cherries. I did 10 that year and had 6 takes, so while it worked reasonably, it wasn’t surefire.
Cleft grafts generally work pretty well too and are really my go-to graft in most situations (except when the diameters are too different). The main difference being that the cleft goes across the middle, rather than under the bark, so you can do it even when the bark isn’t slipping.
