Ok so when I have a charge of Brain Freeze and Fingers of Frost should I cast flurry then ice lance or cast ice lance then follow up with flurry and another ice lance?
Ideally you want to dump your FoF procs before going into your FB>BF>IL cycle.
If you end up in a situation where you are casting FB and you get a FoF and a BF proc then you should ignore the FoF proc and continue with FB>BF>IL. This is because the BF is worth more than the IL.