Category 1 Resto Shot, extra health, extra spirit are all core. Other greens if needed in lane. Can go monster rounds in solo lane to pressure turret. Dont need mystic burst, can wait to full buy improved burst
Category 2 Everything before bullet armor is core, USUALLY buy left to right. Can swap slowing hex for cold front if they dont have a lot of movement abilities
Category 3 Core, buy left to right. Reverb on 1. After Spiritual overflow, you can use TWO powerslashes in 1 ult. With refresher you get like 7 total minimum
And
2 more categories, including:
Category 4
USUALLY BUY ARMORS AFTER 1/2 6k's. Rest as needed