Nidalee is my favourite champion of all the champions out there. I have played her the most and i think i can help people with this build. I hope you like it.

Dorans Ring : The mana regen early game is a huge help and the +15 AP really pay's off for early spears.

Boots LV 1 : Give's you the extra movement speed which helps you to catch up to your enemy and butt *** him with your spear.

Tear of Goddess : Once again mana regen and that 250 gives you an edge if you're going mid considering you will face AP Champ which will most likely use mana + It helps you stack towards something better GET IT ASAP.

Blasting Wand : By the time you have enough to buy this item your plan is to get Archangels Staff as you should be getting close to full stacks on Tear of Goddess.

Archangels Staff : The Stacks give you that Extra AP which makes big differences and it gives you 1000 Extra mana and 10 Mana regen Helping you to almost never run out of Mana and you can go mad with spears.

Death Cap : I consider this item as Core item for any AP Champion it gives you a bunch of AP and as well as 30% increase on your total AP.

Void Staff : that Magic Penetration makes your spears a killer. You can crowd control late / Mid game so well and you can help your team win team fights.

Lich Bane : Sort of gives you a quick burst with Nidalee in her Tiger form.

lIANDRY'S TORMENT : as your last item you want a little bit of health and this gives you enough health to keep you alive for longer it also gives you 50 AP and +15 Magic penetration which adds up with Void Staff making your spear hurt even the tank's in the enemy team.

Masteries And Runes.. Can't explain why just try it. You will see.