Could John copy Sera?

So I’ve been thinking about John’s ability. We have never seen him face off against an enemy stronger than himself without already having 4 abilities (he fought sera that one time with cecil’s, remi’s, Arlo’s and i think zeke’s abilities). There are three possibilities:

1: he cant copy the ability at all since reading the aura is too complex

2: he can copy a weaker version of the ability at his level (so 7.6)

3: he can still copy and amplify the ability, since Sera confirmed he has the aura supply to do so.

Which one do you guys think is most likely, honestly I cant decide between 2 and 3.