FEROCITY:
Fury or Sorcery: So this is pretty easy. Evelynn won't use much of her basic attacks, her main damage comes from her abilities, there for we use Sorcery to upgrade her ability damage.

Fresh Blood or Feast or Expose Weakness: I use Feast because I want to sustain better in the jungle by getting health from killing the camps. You could go for Fresh Blood to do more damage against an enemy champion, but as I mentioned earlier, Evelynn's damage comes from her abilities not her basic attacks. I wouldn't use Expose Weakness because I would much rather sustain in jungle better and have more health when ganking than have less health but more damage from your allies. I could see why some want to go Expose Weakness and it's ok, I just don't like.

Vampirism or Natural Talent:
Easy, Evelynn do not use life steal or spell vamp, we need more damage for her abilities. There for Natural Talent.

Bounty Hunter or Double Edge Sword or Battle Trance: This one is a little bit harder because all of them are good on Evelynn. I prefer Bounty Hunter because I have good ganking potential and that makes it more efficient but double Edge Sword is good to always have more damage through the whole game without relying on something. But it comes with 1.5% extra damage taken so that's why I don't like it. Before I switched to Bounty Hunter I used Battle Trance. It is good because you usually execute the adc's within 3 seconds and the extra damage helps me do it faster so they won't escape as easily. But after those 3 seconds the extra damage is gone and I will be doing less damage in the team fight that breaks out after the assassination of their adc. With Bounty Hunter I can get up to 5% extra damage but to reach that I need to kill every member in their team at least once. There for I go with Bounty Hunter.

CUNNING:
Wanderer or Savagery: Easy, we want the extra movement speed with Evelynn so we can easily catch up with the enemy after marking them with Allure (W) because they will usually run away as soon as you mark them. There for Wanderer

Runic Affinity or Secret Stash or Assassin: This one depends on what champions the other team has, if they have a jungler like Shaco that will invade you while you jungle you will probably want to go Assassin so you can duel him in when he invades you. I also pick Assassin if the enemy team has a really good split pusher so I can deal extra damage to him when he's split pushing. Other wise I would go with Runic Affinity. Secret Stash isn't really an option because we will use Refillable Potion.

Merciless or Meditation: Easy one. I use Merciless because it gives me more damage to my execute Last Caress (R) and Meditation is not an option because you have the Hunter's Talisman that already gives you more mana in the jungle.

Greenfather's Gift or Bandit or Dangerous Game: This one is more of a personal option because some people like to play with Dangerous Game to sustain in team fights a little bit better or Greenfather's Gift to deal more damage in the jungle and in the start of the team fights or for the ganking. I use Greenfather's Gift because I like to have a fast jungle clear (faster than the enemy jungler) so I can gank with the acknowledge that the other jungler won't counter gank. Bandit is not an option because we won't be killing minions that much.

Precision or Intelligence: For assassins Magic Penetration is really good and useful and we already have 10% cdr at lvl 18 with our runes + 20% cdr from Morellonomicon. There for I go with Precision.

Stormraider's Surge or Thunderlord's Decree or Windspeaker's Blessing: First of all Windspeaker's Blessing is absolutely no no because we don't use shields or heals, we're not a support. Then the other two options depends on if your team is a late game team or an early game team. Stormraider's Surge for the late game and Thunderlord's Decree for the early game.

You always want to start with the blue buff on either side (ask your team if they can ward your red), then go to wolfs and clear them and after that take the gromp. Then go and check your red buff and then clear raptors. Then go to krogs and clear them and after that take your red buff. After that you can take scuttle crab that's on your side and watch for possible ganks. You can also try to ward the enemy jungle if you know which side the started on and where he might be now. Then recall and buy the first back items. Then clear the jungle the same way again but start with gromp then wolfs then raptors and then krogs. After that try to find a gank or if you have the moment to gank while you clear the jungle just go for it. Evelynn's ganks are super strong when you reach lvl 6 because her passive will give you camouflage.