This build is only for confident Evelynn players. This build gives you the burst, the cc and the tankiness you need.
Pros / Cons
If she gets ahead, she is a god in mid/late game
She has amazing ganks
She can counter jungle everyone besides lee sin
She can build around 10 different ways
Pink wards in sneaky places revealing her
If she gets countered (which is unlikely), she will be behind
She isn't as strong as a saded jungler
She needs some sort of pen (magic if ap and armor if ad)
Creeping / Jungling
Evelynns clear at level 1-3 is a bit hard so what I do is stuff at red/blue buff and counter jungle as you should have ignite or exhaust. I usually get first blood with it and I keep doing it until laning phase is over.
Overall, Evelynn's clear is 7/10.