You have a nice guide going on there! Couple of question first: Why go with flat mr glyphs, when you could go with Magic Resist per level? No AP will come to poke you on top lane at first six levels and by then you should already have enough MR to deal with them.
Second one: Why pick Thornmail as your off-tank build sequence, when you could have something like the Guardian Angel? The reason there is a off-tank is to get the enemy teams attention, while soaking up the damage. Having Thornmail just makes people to back off from you and attack other champs...
I would also recommend GA instead of Thornmail, because when Yorick gets back he's ghouls are up to par again and deal "Tons of damage". Still nice guide! Got my upvote.

c2TRC, I never have trouble early game and I tried defensive masteries, but I have sooo much more success using the typical 21/9/0 build. The damage output is GREAT and you become pretty tanky. Now obviously you won't be as tanky as possible, but that's why I said "Off-Tank" over full blown "Tank".
On the other hand, I like trinity force for the "Sheen" effect, movement speed, and everything else it contributes.

blastantir... Thank you! :D I will add detail as I go along and my future guides will get better and better. I will absolutely read your guides!

Nice start, just try to complete it adding some more details ;)

anyway take my +1

Maybe you can read and vote my guides too

This isn't a bad guide by any means, but I think you (like a lot of people) may have missed the bus on how your masteries should work. Ideally, you want to build defense and mana regen. Try going 0/23/7 and you'll find his early game survivability to be greatly improved. His DPS is improved by his ghouls and the buffs that they give him from his passive.

All in all, though, nice build. Only other pointer I'd have is that if you're going to be building Atmas, build Frozen Mallet instead of Trinity Force. That'll pay off in spades.