Hiho
This is my guide to a little different Nidalee.
When you're going to upvote/downvote, please leave a comment, so I can check your criticism and improve my guide to a successfull AD Nidalee :)

I do the path of a normal AD Champ. So I choose
9x Greater Mark of Desolation - ArmorPenetration: Standard.
9x - Evasion: Works perfectly with and your masteries.
9x - Cooldown Reduction: We will need it for you most important attack; Takedown!
3x Greater Quintessence of Desolation - ArmorPen: Pretty standard for ADs
3x - Health: Yes, your squishy early game. So just use 'em when you have problems with this Champ. Little more survivability.

21/9/0
Why do I choose them?
For a AD Champ, the OffenseTree seems pretty standard :D
I choose Achaic Knowledge too, because almost every skill of you goez with magic damage. We we can increase this damage a little :)
Defense instead of Utility masteries?
Yes, because we need Evasion to increase the survivability.
Nimbleness is just a cool bonus and you don't need this last point anywhere else.

I start with a and 1
You need the Long Sword later for or
I continue with more movement speed and dodge <3
They are cheap and you should buy them instant, when you go back the first time.
Next step. Here you need to know something. Are you dominating with your team or are you just a little bit careful?
#1 - Choose this. This is such a nice boost for your AD when you get some assists or kills <3
#2 - This is the first Item for your Much health and a cool slow on it :)
Now it's time to get your keyitem ->
The buy order for this item is: > >
Trinity Force will boost your attacks. It increases your next attack of 150% of your AD. You will need it, or your other spells in Cougarform are just useless.
As the next item I prefer Just because it increases your AD OVER 9000!!! It has the most AD in the game. Of course when it's stacked ;) Lifesteal is just great because your Takedown will heal you OVER 9000!!!
We go on with What an AD boost again and what a great passive <3 Crits are usually over 1000 now ;)
Next is Usually the enemies build now on Armor :D COUNTER IT!
Finally if you dont choose the path of Occult, I would choose Very effective passive and a lot of magic ressistence. You can surely swap this item with Last Whisper, if you have some heavy casters or annoying Ashes :D

Very short:
R>Q>E>W
Start with 1 point in your E for healing your partner when there are problems.
Q is important because it's your main skill. Javelin for a finish when the enemy is fleeing and... Takedown. self-explanatory
To get some Creeps, level your E next.
And last but not least your W ;)

ALWAYS LEVEL UP YOUR ULTI!

I prefer and choose always
- For more survivability and very often double-wall-jump ;)
- Great for 1n1 with AD Champs, fleeing enemies, or running away

Other Options:
- There are so much situations when you are like 'Oh ****.. he dodged my Javelin and is away now'. Ignite is good for such situations.
- Good for running away or just follow a fleeing enemy

It's pretty simple to play with AD Nida
First of all try to hit your . The more range the more damage :)
After this -depending on the enemy- try to heal yourself, to get the AS-bonus.
Go in your cougar-form, try to jump on the enemy. IMPORTANT. You have to hit him with you jump to be sure to get a hit with your
Spam your skills now :)
Start with to get another hit with your
Important here is, to time your attack because has a CD too
Now it's time for some autohits. Jump if you want to ;) Now your finishing move; Takedown. This is you're nonulti-Garenulti :O lolwut
With a bonus boost of , the enemy champ should be killed, when he has about 40% life. NOTE: The less HP the enemy champ has the more damage icon= Takedown size=64] Takedown does. That's all about my little playstyle
Squishy enemies are just some food for you.

-With this build you should be most time in your cougar form.
-You can jump through some walls with your W (For example this one at dragon - There are much maps on Mobafire which show your capabilities)
-You're E, your HEAL gives a great buff for attackspeed. Use it on you or your mates
-You can backdoor towers (Trinity Force procc, Heal, Q)

Just try it out ;) Pretty cool
But you need to farm good and do some kills. Maybe steel 'em :P
And I know. There aren't much builds which are more expensive
But fun is more important than any bloodhard game mechanics :)
DO NOT USE THIS IN RANKED GAMES
Leave a comment ;) Bye yo!