CST - Reducing Simulation time for Ferrite-EM Simulation

I am designing an Isolator using Permanent Magnets in CST Studio suite 2020. For simulation I am creating biased Ferrite EM coupling project. The current procedure of using Biased Ferrite EM coupling is taking me 8 - 10 minutes even if I restrict adaptive mesh refinement to 3. Are the there any other methods to undertake simulation for Isolator? Or how do I reduce the simulation time?

CST Studio Suite