I'll pass on the 'help forming me'
Does this part already have a rough opening which you have to clean up?
Trochoidal is a good choice when you've got limited horsepower, or extreme tool lengths that will not permit full diameter tool engagement. In cleaning out large solid sections with considerable depth is where you would see the greatest advantage.
Otherwise, profiling around a rough opening may be as efficient as anything.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)