Nidalee is a champion that can bring you a lot of fun, and bring you many victories. If you are looking for fun in their games, she is a great champion for you.
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Mark of attack damage: provides a good farm and a good damage on your basic attacks for more damage on your enemies.
Mark of armor penetration: provides a good stud with basic attacks.
Glylph of magic resist: provides a good performance against AP top's.
Seals of armor: offers great performance against top AD's.
Quint of attack damage: provides good farm and good damage on your basic attacks for more damage on your enemies.

Teleport: good to split push and still participate in team fights.
Why do you like ignite on Nidalee? You can kill your opponents very easily because of its ability "Q" which is the percentage of hp. And also to negate any kind of heal the enemy team.
Is it necessary to flash on Nidalee? Yes, it is necessary to escape ganks and also to start a fight or something.
It's good to use teleport and ignite Nidalee? No, the flash can not be replaced. Or you use ignite or teleport you use.

Pros.

very easy to farm
good split push
very easy to make a lane
after level 6, very hard to be gankado even more difficult by brushs
good mobility
much damage on basic attacks

Cons.

before level 6 very easy to be gankado
bad presence in team fights
weak against damage bust

Loses:
Irelia
Pantheon
Teemo
Kayle

Wins:
Darius (very easy to play against him Nidalee xD)
Yorick
Jayce
Garen