I found something in the JWA Toolbox is that if you but an effect before the actual attack, the effect happens first before the attack:
Now, as you can see:
The ability A makes you vulnerable first and then it attacks (ignore the reduce speed effect)
The Ability B you attack First and then it makes you vulnerable
Now whats interesting is that there are some effects that need to happen before the attack like removing shield, removing evasion, piercing armor, etc.
Then there are some that need to happen after the attack cause otherwise its not balanced like vulnerability (Remember when carbonemys made you vulnerable first?), …
And there are some effects that dont really matter whether its after or before the attack like speed decrease, distraction, bleed, pinning, etc.
I used A and B in the JWA battle simulator:
When i use Ability A, A would make the target vulnerable first and then attack
When i use Ability B, B would attack and then make the target vulnerable
So first, i didnt know this is how JWA Toolbox worked; and second, should Ludia tell us in game what effects are applied first before the attack or are applied after the attack?
Dont really know why i made this topic since its not that interesting but eh…