Without any calcs or time to research to bacj up my opinion, I would. Here is my reasoning: Acrobatics has 165 power with STAB while the best you'll get on a special move is Power Gem at 120. At +2, both of your offensive stats, regardless of 252 vs 156 EVs, hit around 600-700. If you keep the majority of your investment in attack, Minior is able to OHKO bulkier stuff much easier because of how strong Acrobatics is. If you invest fully in SpA, you won't be getting many more OHKOs or 2HKOs and your Acrobatics will only 2HKO what it used to OHKO at the benefit of manipulating your coverage. A Rash set with 252 SpA EVs and 156 Atk EVs is better at coverage but you will not OHKO as hard, so it's better in weird stuff like Sun since in that case you will easily get rid of stuff ground or flying get rid of anyway (steel, bug, grass, rock, poison, etc).
Of course, because of your post I will spend a few hours during the day when I get gome from class looking at SpA-invested calcs and sharing those with you so we can see how Minior does either way, but remember that Acrobatics is by far its strongest single hit move so it gets the most possible OHKOs focusing on making it OHKO with special EVs for coverage that would resist flying.