That's an interesting take on it, however with full buffs (Brotherhood, RoF, Twin Snakes, etc) your 3% creeps up to around 4.5%. Granted those buffs aren't up all the time, but when they are is it still worth the 4.34% speed boost to lose that extra 4.5% damage?

The tool tips sound like you can use RoF with FoW, so you get your 4th stack and still get your 30% boost. Is this the case?