I recently started experimenting with solder test coupons on tooling strips, as it allows us to test the solderability of the board, without sacrificing the board. Soldering on the panel means it will still be able to go through our standard process, printing etc still works as there is no paste on the PCB itself. These need two top copper objects and solder mask per pad (so very object expensive in the Panel Setup - Add Objects ).
There are several suggestions. Use either a Matrix file or Job file to construct your coupons. If you look at the FAB3000 example matrix files, you will see the usage of many unique FAB3000 features: <FAB64_INSTALLED>/Examples/CreatePanelEmbeddedMatrixandJob.fm6