I really want to master Jungle soon cause my friends have been urging me to play ranked with them. I have tried Master Yi jungle, didn't fit me cause I'm not really comfortable playing AD Champs. I then tried Nidalee, I did will with her in my first Normal Game but I'm still not confident.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1823922788/217813686?tab=overview
Usual Build:
or
Also not to forget... 
Snag a tear after you get smite upgrade or build a RoA immediately after magus to help with mana issues. It helps a lot.
Any of the items in your build above work well on her, but without some form of mana regen or a large pool you're going to go oom a lot mid-late game since her mana costs ramp up considerably as she gets points in her abilities and your mid will likely be taking a lot of the blue buffs.
If you decide not to build a mana regen item then you should probably go trailblazer smite so that you don't need to use abilities to clear and so that you get mana and hp back when you smite.
Okay the most effective way to do your Runepage is to have AD marks, Flat AP quints, armor seals, and Flat AP Glyphs
Additionally your mastery page should look like they do here http://www.mobafire.com/league-of-legends/build/javelins-goin-everywhere-nidalee-jungle-season-5-406893
My build typically looks like this if it's completed or 
with 
2 out of the 3 of these items to finish the build:
If you are going to consider giving up blue buff to your mid laner I go with the ranger's item because you can smite the blue buff and get a major chunk of mana back to continue your clear and such if you're really low on mana it's overall pretty solid, and with her pounce you don't need the movement speed steal from stalker's.
I suggest RoA over the tear route because you get more and more effective as you go on and every time you level you get a chunk of health and mana restored over like 8 seconds, which gives you some really solid sustain while jungling
I suggest typically taking zhonyas and deathcap in most cases. I usually only go Luden's if I'm really far ahead early as it's a super snowbally item, and if you're already snowballing you just keep going even harder into those fights. It's also pretty solid if you're sieging towers a lot as the poke can assist waveclear and massively chunk out anyone sitting under tower. I'll usually only swap Luden's and Deathcap, as the Zhonyas active is extremely valuable.
If it comes down to having to choose, is better at full build than . The latter is better early, but scales poorly.
I would recommend practicing your jungle clears until you can preform them with optimal abuse of soft leashes, pounce resets, and auto resets from Take Down and her R without paying attention. Using those correctly makes a very larger difference in clear HP and speed in the earlier stages of the game. In particular practice the early clears with multiple camp orders so that you can start just about anywhere as needed.
Then learn all the common lane match ups for every lane to know which ones are likely to need help or could snowball really hard if you help your team mate(s). And of course how to recognize when a lane is in a state where a gank is likely to succeed.
Then learn how best to snowball a lead to close out a game before Nidalee falls off as anything other than a poke bot.
Ap nids core item is 40 % cdr idc how u get it aslong as u do once u got it u can spear cougar combo back to human spear again cougar again and repeat for max dmg output
beat way to learn how to hit spears is in my experience playing her in suport
dont try and hit max range spear when going in for a gank try to hit an easy spear just to mark them for the jump folowed by ur laner
when playing nid vision is extra rewarding so always upgrade trinket and buy wards
my build goes like this purple ap smite next morello and boots If you have 10%cdr in runes and masteries you can go twin shadow and tear the active is op if used correctly wich is ridiclousely easy
Next either rabadons if keeping up or magic pen if they r tanky if behind or find yourself blown up when going in rylies i think its named it gives 300hp 100 ap and a slow on ability hit this means once you hit a spear on an enemy squeeshy he also will be slowed taking away 60+% of his hp and slowing them wil make it allot easier for your team to finish them
drop lichbain 40% cdr nod can spear cougar combo spear again cougar combo again
if you have time for auto attacks in between your doing it wrong your cash is better spend on more ap
Ohh no items pics cause phone is bugged but about the clear an easy save clear since invading nid is usualy easy early would be
start with heal at wolves smite it cougar ability human heal back to cat ability yould need 1more heal and 1/2 more cat abilitys til its death i think next get trap
run to crab place trap in front of where it is going to spawn and wait 2/4sec for it to spawn while using heal to get hp back let it walk over trap jump it use cat e run back jump it again now kil it go to blue place ward behind it kil blue with traps heals and cougar abilitys and use 2 health pots for it next run to toad smite it kil it now back buy trailblazers a ward pots or w/e
kil chickens and see if you can gank mid if you can do if you cant kil red and golems
