You could do that but there are a few problems with Atma's first over Frozen Mallet first. Atma's gives 1.5% of health as damage. So the more health you have the more damage you do. Frozen Mallet is a great boost to health and damage, as well as an on hit slow effect. I personally find its bonuses to be more substantial earlier game than with an Atma's first then Frozen Mallet. But as I've stated if you prefer something over something else, then you go right ahead.

Great guide, had a couple decent games with it. One thing, I found that it takes a little too much time for the damage to get rolling, maybe consider getting Atma's before frozen mallet?

Thanks to Onrion my guide now looks like something, there are now coding so its not just walls and walls and walls of text.

I like the word "shovelsmack"

Wonder how I can include it in a sentence...

Nice to see another Yorick guide. Now where to start...

• First of all, I must say that I like the way you write. You have some potential to make the guide much much much better by simply ading pictures and colors.
  
• Your build is ok, but consider buying your Manamune earlier as you want to stack the mana as much in the laning phase as you can. Also, Boots of Speed and three Health Potions are a great start as well. Better nuking capasity and it's easier to evade ganks.
  
• I would love a litte more information about the gameplay and perhaps a little tips and tricks. More explenation on the build and and optional choises.

I would strongly recomend you to check a guide on how to make a guide made by Jhoijhoi Here

Please feel free to give me a +Rep if you got any help from my comment. It would mean a lot!
Keep up the good work.

-Onrion