What is the best exercises to use to become strong enough for fouettes en pointe?

Okay, here's an exercise that was really helpful for me. You stand at the barre, with pointe shoes on, plie with one leg out in second, like the position you hit when doing fouettes. Then you push up onto pointe out of the plie and bring your other leg in to pe, and then roll back down and bring your leg back out to second. Do this three times, then hold the fourth one for two counts. Repeat this eight times. Eventually, when you feel strong enough, turn the hold into a single turn, and then (if you can) into a double. Of course, you have to do it on sides, and remember not to stick your hip out when you put your leg out. Doing it on flat helps too, if you ever want to try it at home. :D Hope this helps