How builds are made

What you get

All 173 champions have at least two concepts (347 in total) that work in ARAM: Mayhem, such as on-hit Varus, poke Varus and AP Varus.
Each concept shows the item order, skill order and augments to take.
Tanks whose abilities scale well with AP get an AP burst concept, and many champions get a battle mage concept built on AP + health items.
Augments are offered three at a time at random, so the list means "take these when you see them". Higher is better.
Champions are grouped into six roles: ADC, Mage, Tank, Bruiser, Assassin and Support.

Riot's official API (Match-V5) does not return ARAM: Mayhem games. Even players with hundreds of normal ARAM games show zero Mayhem matches.
So instead of numbers, concepts are built from each champion's kit and each augment's effect.

Augment names, tiers, effects and values, and the ARAM: Mayhem shop: game client data (CommunityDragon), patch 26.22.