Amaterasu, The Shining Light (Patch 5.16)

Warrior Tabi:This is the absolute best pair of Yeezy's in the game. It gives you a whopping 40 Physical Power, which boosts early game damage and is sometimes the only damage a solo laner gets. Nothing else needs to be said.
Reinforced Greaves:This item is the tankier alternative to the Warrior Tabi for solo laners. It provides 10 Physical Power, 100 Health, 20% CC Reduction, and a maximum of 18 Protections. This is an amazing tank alternative to help sop up damage for your teammates.
Breastplate of Valor:Debatably the best Physical Protections item, it offers 65 Protections, 300 Mana, 10 MP5, and 20% CDR. This is the item to get first if the opposing solo is physical.
Genji's Guard:This item is similar to the Breastplate of Valor and offers 150 Health, 70 Protections, 40 MP5, and 10% CDR. A good first item against magical solo. (Note: You should always get both Genji's Guard and Breastplate of Valor. Just get the corresponding one to the enemy solo first.)
Sovereignty:A basic support item that provides decent Physical Protections, HP, and HP5. Good aura to keep your allies healthy.
Heartward Amulet:Same as Sovereignty, but magical. gives very good magical protection, HP, and MP5. Also has the same useful aura, but with magical protections and MP5.
Jotun's Wrath:Standard jungling item that offers good Power, Penetration, Mana, and 20% CDR. Doesn't have to be first, but should always be in build.
Crusher:A very powerful item in the meta since Season 5. Good Penetration, Power, and AA Speed. Also deals a little extra damage when you use abilities. With a full combo and a full build, you can do up to 200 extra damage with Crusher's passive.
(Note: For jungling, you should get the tier 1 item when you first exit fountain, but during first back, build Warrior Tabi, and then start building on your tier 1 item. for AA build, build katana instead of mace.)