Flash is probably the best summoner spell in LoL and can help with escapes/initiates and many other things. This spell has saved me countless times and secured me many kills with a flash/ghouls/ignite combo on a low hp tower hugger.

I have become somewhat addicted to this summoner on Yorick. It has scored me first blood so many times and also kills on those pesky low hp runners. This in combination with your ghouls and auto attacks can provide some great damage.

Pros:

-Good tank
-Good team worker
-Very good sustain solo top
-Late game almost impossible kill yorick

Cons:
-Early game consume a lot of mana
-Late game dont take damage to the enemys

Yorick is a very good champion on team work. If you and other player are on a lane, try use W to slow the enemys and do a lot of damage, if you´re partner is an ad carry or a champion who makes a lot of damage to force the enemy do the recall and if he dont use recall... Bad news for him because you and you´re partner can kill him easily, if he stay close to the tower try push youre lane and use W to do tower dive and then you´re partner attack him while the tower is attacking you, EASY. Me and my buddy, when i go with yorick, he always go with twitch and we always win thw lane. Believe me, yorick and twitch are a good duo ;).