Actually i have wrote my own guide to Nidalee support, and played her a lot myself in rankeds. First i have to say, your winrate is pretty normal, i don't know if Nidalee support is just overpowered or Nidalee is a lucky champion but 7 wins in a row seems normal.

However, your guide is pretty short ^_^ Also I would not recommend Sheen (--> Lichbane). As Nidalee Support you are so squishy you normally can not get in AA-range without getting half of your HP bursted down. You do not need AAs to be strong on Nidalee, you just want to get your Pickpocket-gold in the early laning phase with the AAs.

Instead of the tear of godess which is not very useful on Nidalee, I would better build an Athenes' since it gives better spamming stats, you do not need to stack the mana and it also provides some defensive MR and AP. Sure, you can use the cougarskills to stack the Tear, but you do not really need the Mana, you do not scale anything with it. Seraphs Embrace has some nice stats though, but Athenes' is cheaper, you get it earlier and since you do not have this much mana the active of Seraphs is pretty poor.