Shen use to be the best top laner but have fallen off lately.
But with a game changing ult,Shen can still help his team greatly.

Pros
Stand Untied
Dragon + Baron control
AOE taunt
Tanky
Taunt+flash combo
Shield for trading in lane

Cons
No damage without items
Taunt+Ult have high cool down
Taunt is slow
May lose tower if you ult to bot or dragon

Use your Q if the minion is far away and use shield if you're taking damage.Easy
Q+auto with passive for clean damage against enemy laner.
Push your wave to enemy turret and take golems or wright camp and remember to ward/trinket up.
When you hit level 6,look at the mini map!

Step 1:Push bot(Cause pressure on baron)
Step 2:Ult on a team mate when they get engage on
Step 3:Taunt someone
Step 4:Use ALL your items
Step 5:Stick or peel for your team
Step 6:???
Step 7:Get objectives
Step 8:Repeat

Good job!After ten years of hard work I hoped it was worth the weight.