Courage Under Fire
In the words of Bane from that awesome movie, The Dark Knight Rises, "The fire rises!"
Luca's assault on the southern line of Amon's personal guard got the reaction I hoped it would create — a slow dripping nervousness that one gets after one realizes that the wolf is already inside the barn house.
Now, you might say that a ragtag group of four hundred against five-thousand highly-trained soldiers seems like suicide, but Luca and his team weren't up against five thousand. At most, they were facing off against a thousand infantry who'd been surprised by their sudden appearance and subsequent charge.
As for the other four thousand soldiers, they wouldn't come to rescue their friends either. Their job was to maintain the square formation which was their absolute defense.