Does a 5:3:3 split sound reasonable? (I had a 511 cmd drop cost on that one.)
If so, I'd say:
Trerro: ADM, ADM, D, DE, A, 4 gyros
Sonya: ADM, D, AM, 2 gyros
Lomaz: ADM, D, DM, 2 gyros
For inexpensive mods (pretty much everything cheaper than gyro/cluster), we usually just do whoever salvs it keeps it.