Many of my freinds asked me about a good Yorick build so here it is ^^
-I posted a tank/dps build and tank/support build wich i mean is the most normally as Yorick. If you want other builds then please write me!

And remember: If the enemies mid is really fed and their carry isn't then buy some mr before armor etc.

Farming tips as Yorick:
-Try to save your mana when you're on full hp - Don't use spells to farm if it's NOT necensary (If you have Manamune it might be good)
-Omen of Pestilence can both be used to block skillshots and to get lane control (vision in grass)
-Playing against other melee champions Yorick can easily outfarm them by non-stop harrasing them from lvl 1 (Try not to loose to many last hits while)

Again - Remember: using spells on minions to last hitting them summon Omen's - Means that you can harras the enemy without actually focus him

Using Omen of Death:
-Using the spell on the ad carry is the best possible you can do if it's hard for him/her to survive.
-Be carefull not to use the spell on some1 with much hp (specially not a tank)

marks: Dmg - More effective harras
Seal: Armor - Many top players is ad - A few armor runes can make a big diffrence
Glyph; Mr lvl 18 - As said, mostly all top players is ad, means that you want need much mr in low lvl's - Even if you're playing against an ap champion, She/he won't make much dmg in early game anyway (Really effective)

If you still got some problems or don't find this build so effective - write me

-Thanks you!