Hi,
I don't graft on figtrees since they are easy to root, and generally I propagate material from my own trees.
I often stick sticks in the dirt to get new trees.
It works really well especially with fresh branches from a tree stuck in March or April - keep the zone moist.
I often separate root-shoots on my figtrees - it would be the same for a branch. Just do a ground-layering . The container full of loam will sit on the dirt instead of being in the air as it does when air-layering.
If your skills allow, you could easily graft the ground-layer before separating it from the mother plant.
I now put my new propagated trees in pots as they are backup-plants or coins for possible future trades .
Now, I just need more space for my in-ground trees and all the pots ...