Having Teleport as your summoner spell is a great deal and helps you have a presence anywhere on the map using you ultimate to help a teammate then teleport back to you lane.And never rush into a fight using E,keep it until one of your teammates is attacked or more than ONE enemies can be hit with it,preferably use E to reach the main damage dealer and keep him off your team.Your Q is very important in team fights,try to use Q on the opponent your team is focusing because under it's effect ,everyone who attack him,gains a bonus health regen

Farming should be easy using your Q or Auto attack and keep your Q to harass your opponent and use W to shield yourself if he tries to harass you,your E is a VERY USEFUL SKILL it can help you catch running enemies,escape from ganks,jump over terrain and any enemy hit with E will be taunted and will attack you with reduced damage.Useful combo(E+auto attack+Q+auto attack+W) and back away