There is a lot of really cool information on fragging scolys out there at people have been experimenting with. I have yet to try but defiantly in my list to try out, hopefully this year.
A scoly can be fragged in half, or even in 1/4's or 1/3s, etc. You are looking at a long recovery time as they are slow growers. The slow growth, however, is the skeletal growth. The flesh heals quite quickly. Supplying that removed skeleton for the flesh to heal onto should speed up the process, and this can be done with large frag discs. You basically cut your scoly in half or wedges or whatever you choose. Even if its just one 'pizza slice' taken out of your scoly. Then you cut a large 1/4 thick frag disc into the opposite shape of your frag (and also the colony) and put them together. This gives the flesh somewhere to heal onto, and the flesh should heal over quite quickly and begin calcifying upon that frag disk sooner than it would have taken to build an entire new skeleton to replace what was removed.
I haven't tried this with a scoly yet, only from what I have read and talked with some others about. I have done similar growing strategies with chalice when fragged, basically rather than letting a chalice encrust down its own skeleton, a recessed frag plug alows for encrusting to start quicker.