hm, this still needs some work.
firstly, nitpicks for both sets: when you mention the usage of zen headbutt, dont say it's because absol is weak to fighting, but because fighting resists dark; that's like mentioning fire blast because of absol's bug weakness ?_?. and superpower is used to hit other dark types, not steel types (the only relevant steel type that is hit harder by superpower than your stab is mega aggron, and it's not even a 3HKO).
now, the sd set should be re-organized. swords dance should be move 1, and sucker punch should be move 2 unslashed, it's pretty much your most important move. then you should decide if you're going to pick play rough or knock off for move 3, since the first nets you perfect coverage, while the second... well, the second is knock off. move 4 would be either a filler move or a decent coverage move. so basically i think it should be organized like this:
1-sd
2-sucker punch
3-play rough/knock off
4-filler move (if you picked play rough)/coverage (if you picked knock off)
good filler moves for the 1st case are will o wisp, thunder wave, baton pass and maybe night slash, while good coverage options for the second case are superpower, iron tail, zen headbutt. i personally would list will o wisp/superpower/iron tail for move 4 and slap the rest of those moves into 'other options'.
on other options, you should remove taunt, which is a 100% shitty move on mega absol: if the foe is going to use a status move/hazard, it's simply going back to them; if they're using a recovery move, you should use that turn to setup; if they're using a setup move, they're a powerful mon that can OHKO absol and you have no business in letting absol stay in.
for team options, you need to list more teammates. forretress is really good as it sets up on pretty much every wall that cause trouble to absol (hippowdon, mega aggron, florges, aromatisse, etc) and makes absol even more deadly with hazard support. nidos are good offensive teammates as well because they have excellent offensive synergy with absol (they tend to be walled by psychic pokemon that are weak to dark, while absol tends to be walled by steel and fairy pokemon that are weak to ground and poison) and resist bug/fighting. rotom-h is an amazing pivot as well that brings excellent resistances and can spread burns and bring absol safely with a slow volt switch. stallbreaker mew is also a really good teammate, since absol's kinda bad against stall, and mew can wear down the opposing team.
for counters, mention aromatisse together with florges, but also mention that SD iron tail absol beats both. mention that bulky steel types like cobalion and escavalier also cause trouble to absol. high defense ground pokemon like rhyperior, hippowdon, donphan and quagsire will also defeat absol, and quagsire even has unaware to avoid sd boosts. pokemon that can take a hit and retaliate like defensive arcanine or mega blastoise will also beat absol. lastly: "Some scarfed users have potential to outspeed Absol, like Heracross and Mienshao." this is kinda wrong; firstly because pretty much any scarfed user will have potential to outspeed absol, but most of them will be OHKOed by a +2 sucker punch. you should say "scarfed users that resist sucker punch", and include krookodile, hydreigon, etc in that list, and remove mienshao because it takes like 88% from a +2 sucker punch, being a shaky check.
good luck.