No, you need a lot less. Storm's Path is going to last probably somewhere around 10 seconds. It'll be at least a 5% buff which puts the Warrior ahead of a Paladin for that duration. There's no reason to think that it would be multiplicative but regardless, you'd need 100-200 Skill Speed. Vmage is saying (I think) it's not a haste buff but a stat buff. I wouldn't be surprised if he's right, and that I should not have trusted Hiir's numbers. I asked Hiir Noivr how he got his GCD (~1.5) on his blog.