I have had pretty good luck getting them out of my MFX arrows.
I put the tips in and heat them on an electric stove and have my vise grips ready and pull them out.
Just make sure you keep the shaft off the heat and just let the point lay on the burner and roll it back and forth, you can smell the epoxy start to cook, take your nocks out also and you will see a tiny bit of smoke come out the other end.
Then I put some alchol on a Qtip and clean the inside of the shaft before installing my new ones.
Rob