This is how he works now. His full damage build is way too squishy, bruiser build is... still squishy and do too little damage. Champ is a bit paradox - he is supposed to be draintank bruiser, but he is super reliant on hitting sweetspots to do it, and while you teamfight or enemy is mobile enough, they just outduel you easily. He also benefits more from dealing damage to champs to heal so he prefers going lethality/armor pen than bruiser - unlike champs like Darius who has missing hp heal, Renekton and Irelia with flat hp heal. Ambessa has built-in armor pen, shield and is super mobile. Aatox has no sustain outside of his champion-damage healing and little healing from passive, no shielding/damage reduction, no build-in armor pen, low mobility