I cut back ficuses, dwarf aboricolas, and mini jades hard when they are actively growing (showing new shoots). You can cut them back to the first or second nodes like maples. The tree needs to be outside in full sun when the weather is at least in the 70's for the best result. When I do this, I do it to the whole tree and leave no leaves at all. With the sun, warmth, and plenty of water, it will bud back all over. I do this annually.