I've often been increasing the COMM offset when I see arm cavity flashes during DRMI acquisition for a few months.  I think based on anecdotal evidence that this helps DRMI lock faster, and it hasn't caused any issue with the CARM handoffs in the times I've done it manually. So Ryan, Elenna and I have just now added this offset into the guardian (ISC_LOCK ARMS_OFF_RESONANCE offset is changed from -100o to -2000).