Traial and Error
Fluke can be finicky sometimes. I have had them hit squid spearing combo one day and the next day they are hitting Fluke strips. Sometimes the will prefere a feather or a shiner on the rig also. I have also done well with searobbin tails filleted them into strips. They last forever.
I have recently started tying my own rather then use the store bought package. Yes it is a couple of pennies more and time consuming but the results are better. Gives you something to do on the cold days of winter.
You can use your imagination to vary the type of rig you want.
If you are going to narrow yourself to one type of fluke rig you are not going to have the same result as changing the rigs to see what is working the best for that day.
It changes constantly with tides, winds, currents, water temps, etc. Sometimes at slack you can even use a bucktail jig if the water is still enough..
I am not that familair with the N/S fishing but I do fish the inside bays and outside of FI inlet and it aways changes.
My advice is to have a few types of setups with you and if takes a few minutes to change them so be it.
I'd rather spend the time working at it and have a better day.
Take a peak at ADDRESSING AND ISSUE on this board it might help you out.