Try the build it works for me.
Runes: if you don't like greater seal of vitality chose something else i go with it because nidalee is very squishy in some situations
Items: Last item is your choice. I rather get a Defens item or Void staff for pure dmg.
Positioning: Don't run into them stay behind try to heal everyone + yourself your best at 1v you 2v you. You can't solo teams.
Gamestyle: Personally i prefer to go mid or solo top if top solo or with a teammate get the blue buff whenever you can. Don't underestimate your bushwack skill in a solo lane it could very much help you know if someone is coming. Try to use you Javelin whenever you can but don't spam it too much .You should always have enough mana for at least 2 heals .
Farming: When you get to 6 level try to stay as much in cougar form as you can change to human only for heals.
Every few levels try to port to base to pick up some items most of my times i go back to base at 7-8 level i get Sorcerer's Shoes right away and if you have enough gold start making a Rabadon's Deathcap
Well try the build it works for me pretty well.
This is my first mobafire build so please don't troll me too much :D .
All feedback is useful .Thanks for the time spent reading or just looking at my build and cya on The Fields Of Justice.