On top lane you should farm until you are lvl 6. Then try to harash with the cougar. With nidalee you can easily harash jumping brush and back and use if you take damage. Deals ton's of damage if it hits far so, if you get ganked use your and when they fall back use to deal huge damage.

In team fights just try to keep the distance and poke your opponet with your . If they suprise you just run away with your in you can jump over thin walls using W.