Honestly, you should never go TP top unless you have a weak early or will split push all game
So many people I play against go teleport and they never use it effectively.
This is solo queue people, your team can't be relied on following up with your teleport.
You're better off with ignite top/mid as you can stomp your lane before proceeding to roam and stomp others.
Examples of champs TP is appropriate: Nasus, Jax.
Examples ignite is better: Darius, Irelia.
but other than them I can't think of a single champion that can use Teleport + Ignite effectively, maybe 