FARM FARM AND FARM.
just farm early game and buy your jungle item, gank mid or top and get more kill or assist possible and then buy berserker boots and blade of the nashor tooth. you will start now to deal a lot of damage and you can bank or kill more often. buy runaan hurricane and keep farming, now you can destroy all tower easy so push the lane whit your team, if an enemy try to engage stun him to death. be alert about assassins or Broken champion that kill you in 2 seconds.
Nerver ingage tank alone.

When you have completed your jungle item and other ap/speed item you start to deal massive damage to all squishi targets, whit your ult you can get some surprise gank to the enemy bot lane or go in enemy jungle and kill their jungler if he had no defence, the best part of this build is that your enemy will strugle to build armor because they don't know if you are Ap or Ad, you can get this for your advance and play in team destroying towers fast and if an enemy try to ingage you stun him to death. try to win the game as soon as possible.

the worse parte of the game for you if enemy have high CC or a tanky team, you need to split push and try to take or steal dragons and baron whit your ult and your stun, you have to build Zonya to survive as long possible beause you have no defence.
Play whit the team or push a solo lane ONLY if you have your ult to run away from possible surprise from enemy team.