Dave, I have not tried the Safaris but I do shoot the 165gr (11gr inserts) and the 125 (50gr inserts) Simmons with great results.
I simply love the Simmons... I use the cheapest method out there, a 5" diamond knife and hook sharpener. I keep the broadhead on the arrow while sharpening. Just work on one side until you get a burr on the other side, the little sharpener will get it done. Once a burr is achieved it's time to work on the other side. Repeat these steps a couple times, using less pressure each time.
After the burr is gone is, simply strop the broadhead on a piece of scrap leather. Take the piece of scrap leather and double it over to get the convex shape that will fit the concave broadhead. While stropping do the same as above, work on one side at a time.
I know it sounds too easy to work but in the time it took me to type this you will have a broadhead that will shave. Good luck!!!