Ugh.
The author could have finished the fight with Starlight Breaker and no one would've complained. The move that finished off the Sankt Kaiser (among many others) and which has an added anti-barrier component built into it can't even break through a little girl's shield? Come the fuck on. I like Vivio as a character, but this is like reading a fanfiction at this point. Worst part is when you remember that in Vivid Strike, Vivio isn't even near being the strongest of the martial artists, so it's almost saying Sieg and Einhart would destroy Nanoha too.
And FFS, stop writing the thing as if Nanoha can't deal with melee fighters, she used to repel both Subaru and Erio while being bombarded by Teana and Caro on a daily basis, without breaking a sweat.
This shit almost makes Force look good in comparison.