Check your spelling, I forgot to mention that. There are a few misspelled words in there (probably in the last part).

It's a lot better now. I still don't think you should advertise aspd on Cassio as she's not an auto attacker and honestly with Q+W you basically clear the whole wave, but as a guide it's much better now.

Should probably mention that Cassio is a very level-dependent champion and taking a solo is the best route for her.

Everything Kinetic said. I would up vote if you explained why you feel she needs attack speed (you only explained that Nashor's gives it).

It's not a bad guide so much as it's a bad build.

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I will clearly explain why i downvote. I do this to tell you that i disagree with your guide in many ways, don't take it offensive, i want to help you evolve your playstyle.

1) Greater Seal of Mana should NEVER be used. 7 mana x 9 provides around 63 mana. If it's because you are mana hungry, this will give you like one more Noxious Blast. MP5 is MUCH more useful.

2) U shouldn't RUSH Athene's Unholy Grail. It's a good item, but you don't need so much mana regen early, especially because your jungler gives you blue. Early Chalice of Harmony is enough.

3) Havoc is a bad mastery. Same with Mental Force . Havoc will increase your damage by 1% with your 2 points. Lategame Petrifying Gaze will maybe deal 800 DMG. You really wanna spend 2 points to get 8 more LATEGAME damage? Not me. Rather use them in utility for more blue buff. And about Mental Force , 4 AP is nothing. Believe me, Butcher is way better for lasthitting.

4) The Revive explanation was a mess. Didn't understand half of it. It's a pointless spell, wasting a slot to be "revived" instantly, with 9 MINUTTES COOLDOWN. Only Karthus could use this, tho barely viable.

5) "For a champion that needs a high amount of ability power and fast attack speed, you cannot beat Nashor's Tooth." That made my day.. Really. Fast AS? KIDDING ME? Your autoattacks deal no damage, and your not even getting Lich Bane which would, make it semi viable. That was so comic, sry man.

6) Yes you are squishy, but Warmog's Armor won't help. 1.3k HP will only be 3 more AD carry hits, as you have no armor component in it. And AD carries usually have around 1.7 AS late, you are dead as meat. You don't need this health if you can position yourself properly.

That was mostly it. I hope you learned something about Cassiopeia from here. I could change the vote to an upvote if you fix those points.

-ThaKinetic

EDIT:

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Haha, really, you did change it. Thanks for the credit. I'm upvoting the guide now, cause all the "bad things" were fix'd, and you give us a good amount of information to Cassiopeia. I still strongly disagree about "using Nashor's Tooth for farming". First, you will always Lasthit in lane. Second. When you get to the point when you have the Nashor's Tooth, you can clear a wave with Q/W combo in a brief. If you get Lich Baneher autoattacks can do serious hurt with Nashor's Tooth, but it's usually too dangerous to go close.

Anyways, good improvements :) Consider maybe re-releasing the guide, as it won't see the light due to the many downvotes that might not be changed like mine was. PM me if you do, and when it's out, so i can vote :P If not, well, you still provided useful information to the community.

-ThaKinetic

Woah, so much trollvotes. This is why you turn on comment to vote.

I like the fact that you included all of the good team members. You might want to add Ashe as a good lane partner, I use her all of the time and it works well together