Are you tired of being a typical tanky damage dealing fighter in 3v3? Would you like to orient team strategy while ensuring the survival of you and your team? Are you tired of falling to a 1v3 game play mentality where your team is, at best, an inconvenience to you? If you have answered yes to any of these questions, you're in luck!
Welcome to the guide on how to have fun and succeed with Nidalee in 3v3. Sit back, relax, throw a few spears and grant vision to everyone in your party.

Zoning is the last thing you should be thinking about when playing Nidalee 3v3. If you are doing well, and therefore would not fall into the pitfall of the cycle of feeding, you will automatically zone without even intending to. How do you do this you ask? Good spear throwing. Gauge your opponents. Are they dodging your spears? Are you utilizing your distance? Do they seem to have a pattern that is easily identified? Worry not about conserving mana; you can sustain while empty with no form of mana regeneration for as long as you like and still be quite effective. So step one, utilize those spears. Remember to get those MySpace angles from the fog of war <3

-Jumping into skirmishes in Cougar form when where are enemies with more than a quarter health
-Conserving mana
-Forgetting to place traps in bushes that are in route to your team being ganked
-Throwing spears where minions will most likely take the hits
-Getting hit by a tower
-Allowing yourself to be in range of heavy crowd control
-Backdooring while there is a team fight. If it was possible to win in the first place, you'll get there on time to be effective no matter where you are

Nidalee is not meant to be tanky. She's not meant to take damage, nor is she meant to be the main form of damage. She can run from almost anything if bushes and her W in Cougar form is utilized. The only thing that should be able to kill Nidalee are things that stop her from getting away. This is why you have cleanse ready at any given point.
With that said, there is another point to be made. Her traps grant vision and extra damage, but they don't stop enemies from coming, and they are not guaranteed to be sprung. Every time Clairvoyance is off cool down, it should be used. As you get used to Clairvoyance in 3v3 you will notice that it is a very versatile and extremely useful spell. You can prevent team mates (as well as yourself) from being ganked. You can grant vision in bushes, you can reveal if they are taking dragon or simply baiting your team. You can deny low life running enemies from juking/baiting your allies.
Furthermore, Clairvoyance is a very good ability to get good spear chucks in. You will find that you get more kills and will survive a lot more often with Clairvoyance than heal, flash, ghost, or exhaust.
An enemy believes he/she is safe. Enemy begins going back. Clairvoyance. Shink (You have slain an enemy).