Talk:Kassadin/@comment-87.211.80.3-20121110140249/@comment-4881935-20121111022036

^1 second is a lot, but the real question is, is it worth that spot to rank at that time. A good example for why this differ is like where it grants high boost in movement speed and attack speed, but is usually saved last because the other spells are just more beneficial at the early-mid game.

In my opinion, E seems more better to rank at level 11-12, and save the ultimate for level 13. The decrease cooldown by 1 second allows slightly better mobility, but mobility is not that useful if you can't win the fight.

Around level 11-13 is still the mid game where small skirmishes well usually only occur. Burst is the most important factor in small skirmishes where ranking up E offers better. Having more upfront damage to force them to kill seems better (including the fact that the slow will be stronger) than being able to retreat slightly better.

But to the OP, I say, you should choose what you determine is best for the situation. There is clearly a decent use for ranking the ultimate at level 11 or E at level 11-12. If you're going for the kill though, I say E is the better option.