I change that spread a lot, at the time I think I was using either 200 HP / 56 Atk / 252 Spe or 252 HP / 4 Atk / 252 Spe. Also this is random, but for your Neon Heart team, a better spread for your weavile is 32 HP / 252 Atk / 184 Spe / 40 SpD instead of 72 HP. 32 HP is a good LO number and the SpD EVs are somewhat noticeable when switching into latias'/starmie's t-bolt or surf or blissey's ice beam. A super small nitpick, but it's been bothering me lol