Arachne Conq Jungle - 7.10

START

Relic:
I would go for either Blink or Heavenly Wings here, but you can go for Aegis if you're facing some early game damage dealers.

Blink is good for the gank, but I usually have a hard time hitting Arachne's web after I blink towards someone.
Heavenly Wings has the same cooldown, it buffs your team, and you'll be moving so fast as Arachne that you won't feel like you needed blink as long as you hit her 3.

Leveling:
For Arachne's abilities just go for your 3 first and throw two of them at mana camp before you go speed to start. Then I usually even out the rest of her abilities starting with her 1.

LATE GAME

Offense:
If you're not getting destroyed by the enemy team or you feel like you're not doing enough damage already, I usually sell boots for either Stone Cutting Sword for a little bit of protections and pen or Hastened Katana for more boxing and chase-down ability.

Defense:
If you're taking a lot of damage or getting collapsed on by the other team I usually build one of the robes other than Hide of the Urchin.
Spirit Robe if there's a lot of CC.
Magi's Cloak if they have stuns or roots.
Mantle of Discord if you keep getting collapsed on.