I see no use for flyes.....EVER. They are a "pretty" exercise, meaning, if you have some size on you, you will look great doing them, but they are not a core mass builder. Spending weeks away from exercises that actually do build mass just to do flyes makes about as much sense as tits on Rosie O'Donnell.
As far as you moving between cycles, please, quit the bullshit. An experimentation phase? For gaining some muscle mass? Find a program and stick to it. Jumping from one to the other will do very little for your overall goals but allow you to waste time in the gym. Lastly, throw away your Men's Fitness magazines.