Is there any gameplay that would require multiple Crucibles to be working in unison?
Cloud Imperium
The crucible is capable of repairing a majority of damages attained by a ship. We do not have multi-Crucible gameplay in our plans for the near future, but we are looking ahead to scenarios where multiple ships might more quickly repair a crippled, larger capital ship (such as a Bengal.)
starfarer.space · Q&A: Anvil Crucible