Hi, this is my first build. I chose shen, because with this build I almost always succeed.

Shen is a ap tank and with a little bit of ap you can rule solo top easily. you just keep spamming those knifes and own that top lane. with this build you won't be hit much, because of big health regen and your shield.
With this build you can easily engage a teamfight by dashing into them.

If you want to engage in a fight in top lane. Dash in throw your knife and use your shield. keep spamming those knifes and if u see that you losing health. just walk out and if possible dash.
In this way you can regen your energy and passive and if those are ready get back in and keep poking your opponent. If you think you could kill your opponent, but you are losing health keep attacking. He probably thinks he could kill you, but when you're almost dead use health and spame those things. if you are chasing someone don't throw knifes all the times, but regen energy for your dash, dash in and you'll get some energy and be able to spamm those knifes again.

If you want to engage into a teamfight, try dashing into as many people as possible, then throw you knifes at the target to focus, so your team can heal on him.