Re: Fiora Spotlight
From what I can tell, the optimal skilling order should be W > Q > E, not what is recommended by Phreak in the spotlight (E > W > Q). What do we get by leveling each skill?
Lunge (Q): -2 seconds cooldown, +25 base damage (+50 per two hits).
It's a straight 50 more damage on your laning opponent each time the cooldown's up, every 16 / 14 / 12/ 10 / 8 seconds, if you choose to use it that way. It's also your gap-closer against ranged laners, a fleeing opponent and can be used to juke ganks.
Riposte (W): -1 second cooldown, +50 base damage, +5 bonus AD.
The base cooldown is nearly half that of Lunge, so despite a lower flat reduction in cooldown it's nearly equal in terms of the uptime increase. However, in addition to leveling for the same base damage increase, it also blocks the damage of the attack it deflects! The bonus AD gain, while very small, makes lasthitting easier and does scale your other abilities slightly.
"But Mr.E, Riposte doesn't do any damage if they don't attack into it!" You're right. While it's unlikely the opponent will avoid attacking into it 100% of the time, even if we assume they do, either way you're mitigating potential damage. (Not attacking = 0 damage!) An active Riposte means 1-2 free autoattacks on the opponent that they can't do anything about, which is worth far more than +50 damage per 2x Lunge (one basic attack = 60-100 damage even early). Dealing even more damage on top of that, should the opponent attack into it, is icing on the cake.
Burst of Speed (E): -1 second cooldown, +15% AS, +2/4/6% movespeed.
How much is an extra 15% AS worth? In a duration of three seconds, not much. To save you the math, it buys you one extra basic attack about 1/3 of the time, depending on your level and items. That is roughly equivalent to a damaging spell that increases in base damage by 1/3*(total AD + on-hit effects).
At Level 3? That's 64.1/3 = +21.36~ damage per point, up to 81.01/3 = +27.016~ damage per point with AD runes plus a Doran's Blade or Long Sword. Compared to Lunge, that's half the damage per skill point and it requires a solid three seconds of autoattacking, rather than instant damage! CC will screw you: Irelia stun & run, Udyr stun & run, Lee Sin Safeguarding away, Teemo blind... Compared to Riposte, the four extra autos you get during a BoS is worth 20 additional damage just from its passive bonus AD, let alone the additional benefits Riposte provides. Oh, and the cooldown reduction per level is the worst of all her skills. It has the lower -1s reduction of Riposte but the high base cooldown of Lunge, so leveling it provides the lowest increase in uptime per point.
Burst of Speed gets better later on in the game, as autoattacks scale much better than Lunge and Riposte do. Maybe you level it second, so you'll have it maxed by the time you get hold of Wriggle's + IE and laning starts to break down, but the damage increase on Lunge will still be competitive then and the cooldown reduction on it is more meaningful.