Ashe rework and what to max
I'm a little frustrated at the moment. I tried to write this thread, but my browser crashed and I did my math wrong. I don't really feel like typing out all the math again. I hope you understand :(
Anyway, I based my math off of an Ashe with 1.0 AS, 100 AD, and no CDR. The enemy has 30 armor and 2000 health.
The surprising result here was that, assuming Ashe gets a final W at the end of the 4 second damage period, was that a maxed W will deal about 30 more damage. Of course, this scenario is highly unrealistic- in a situation where the Ashe has built crit chance or attack speed (Statikk Shiv lol) Q would deal more damage. But as it is, W is a safer choice anyways, and especially if you rush a BF sword and/or IE, you should max it.
tl;dr: Rush Shiv, max Q. Rush IE, max W. There ya go.