personally, I would think long term and let it go for now, just put it on the shelf and do nothing...
If you let the branches grow long, they will thicken up rather fast... and you can very easily increase the overall size of this tree. The real nice thing about most ficus, is that you can end up with a really nice tree within a rather short amount of time.
I usually will decide which will be possible leaders and either wire for shape, or just let them be... the others I will wire down, as lower branches. Since there are not alot of branches on this tree right now, I would keep them all, they can be cut further down the line if one wants too.
Now, if one wants a very small tree... I would still do the very same process... this type of ficus can really handle massive cutting, and still barely flinch!!! Don't forget to try and root any "woody" cuttings, so you can increase your collection. I have found that I have about a 90 percent rate rooting my cuttings is just spagnum moss alone, no root hormones. I take a very small nursery pot (4" or smaller) fill it with damp moss, make a hole, place the cutting in and push the moss in arround it tight... that's it. Keep it in the shade, water about once a week, don't let it get to damp/dry. In about a month, you will see roots shooting out the bottom.