Could you post a picture of the effect you want to create? A quick google showed many different types of fluting, so knowing which one you are thinking of may guide the conversation.
But, from what I saw if you want fluting on a flat surface, then a contour toolpath, no offset may do the trick.
ok… I am trying to design an oar so the paddle starts at 1.5 inches and ends at 0.5 inches and I do not find a way to achieve other than creating multiple progressive toolpaths.
For that you will probably want a 3D CAD tool — it can be done in Carbide Create Pro, but you need a stock size twice the dimension along the axis of inclination.
If you’ll post a sketch and some rough dimensions we can walk through this with you.