I'm running a damag calc against Amoonguss with 252HP and nature/EVs to have the same stat on both physical and special bulk (Relaxed + 4 Def EVs reaches 100 stat points in both Defence and Special Defence). I'm also using an Adamant Aerial Ace Aegislash and a Modest Shadow Ball Aegislash
252+ Atk Life Orb Aegislash-Blade Aerial Ace vs. 252 HP / 4+ Def Amoonguss: 133-156 (60.1 - 70.5%) -- guaranteed 2HKO
252+ SpA Life Orb Aegislash-Blade Shadow Ball vs. 252 HP / 0 SpD Amoonguss: 133-156 (60.1 - 70.5%) -- guaranteed 2HKO
The exact same damage. However, if you take in consideration that Amoonguss usually runs a more physically bulky Rocky Helmet set + possible random Intimidates from your opponent, you can see how Aerial Ace is significantly worse than Shadow Ball.
..and this was "GMX for the common meta", thanks for tuning in, see you next time.
252+ Atk Life Orb Aegislash-Blade Aerial Ace vs. 252 HP / 4+ Def Amoonguss: 133-156 (60.1 - 70.5%) -- guaranteed 2HKO
252+ SpA Life Orb Aegislash-Blade Shadow Ball vs. 252 HP / 0 SpD Amoonguss: 133-156 (60.1 - 70.5%) -- guaranteed 2HKO
The exact same damage. However, if you take in consideration that Amoonguss usually runs a more physically bulky Rocky Helmet set + possible random Intimidates from your opponent, you can see how Aerial Ace is significantly worse than Shadow Ball.
..and this was "GMX for the common meta", thanks for tuning in, see you next time.