I know this is a WIP, but i really think that Fire Blast should be slashed over pursuit on the All Out attacker set, and that Naughty should be slashed as the primary nature over Adamant. Fire Blast does way more damage to tangrowth than Megahorn can ever hope to do, and lands the 2hko on Steelix, which is a big roadblock for Absol otherwise because of superpower's Attack and Defense drop. Fire Blast also gives Absol a handy Weapon against Escavalier, Durant, and Ferroseed, OHKOing both of the former (has to hit durant on the switch in) and 2HKOing the latter while skipping the residual Iron Barbs damage and Attack drops from superpower. I would still keep Pursuit as a slash because it still has its uses, and a Pursuit coming from Absol is going to hurt like hell, but i think Fire Blast is simply the better option on the wallbreaking set.
16:46 <TLCNU> Esca literally is 2HKO'd by Stoutland Fire Fang
10:33 skylight molk put me in your sig