Go through each skill solely. First have each group do a straight ride. If the straight ride isnt good, they certainly wont be able to add skills to it. Fix each groups errors then move on to single twist tosses. Again, fix the errors. Then move on to kick tosses. Again fix the errors. Finally, put it all together. It sounds strenuous and it can be at times, but it helps incredibly. Its hard at times to notice a single thing that goes on during a toss where there are multiple skills, so this allows you to fix each part individually, making the entire toss perfect. Good Luck!