Standard Jungle/Mid Violet Build (Highest Damage)
Soulreaver (First Item always) - This jungling item is extremely powerful for scaling and early game. Its a must buy! Unless youre not taking Punish. You dont have to be a jungler to take punish! You can always solo mid lane with Soulreaver, snowballs yourself into late game. Skip this item and proceed to Rankbreaker, then boots if you are really persistent to take Flicker or other spells..
Boots (Second) - There is three choices. Sonic Boots, Gilded Greaves or War Boots. Buy Sonic Boots if you are against heavily attack damage based team, Gilded Greaves if ability damage and crowd control, War Boots if you want to be more offensive. They are all good and viable choices.
Rankbreaker - Grants you attack damage and armor pierce. Overall a powerful item to buy on Violet. Deals tons of damage whenever you critical strikes with these massive armor pierce from Rankbreaker and your Arcanas.
Claves Sancti - Increases your critical strike chances by 30%, which puts you at total of 46% critical chance. Its good enough to rely in teamfights or in duels. And also, attack damage.
Omni Arms - Violets first ability, Tactical Fire has a really short cooldown. It would proc Omni Arms Passive to deal even more damage. Extremely deadly. You can really poke or burst someone down by just Tactical Firing.
Muramasa - Grants you more attack damage! And most importantly, % armor pierce. Now, you will have more than enough damage. Muramasa would helps you deal even more damage against those who buys armor items.
Frost Cape Build
Soulreaver > Boots > Claves Sancti > Frost Cape > Muramasa > Fenrirs Tooth