At the start of the match, its about slaying the enemy minions and sneaking a kill on their midfielder asap. Slay the midfielder, push the tower. Recall, for more health/mana, teleport back before he reaches your tower, kill em again, repeat the cycle.

Once you got the home-guard boots and the mid is out of danger of loosing a tower within the next 2 minutes, recall, rush the other lanes, and push till a new threat appears, recall, rush the new thread, deal with it, prioritize threats and respond.

To the enemy, you will appear to be on all lanes at roughly the same time because of your travel speed. they also wont be able to push any lane with just 1 champion either because you will be there to deal with it.

when the battle switches to the enemy side of the map, flank, engage spam all abilities at roughly the same time, retreat, and repeat. once u loose mana or 50% health, recall, and re-engage.

( The teleport ability is what I use when I am in 1 place and need to be at the other at that exact moment, it happens often enough and having teleport will help you keep up the pressure, push a tower, port onto towers that are about to fall, nuke their heroes by blowing your cool downs and save the day.)