Before we do anything, let's identify the Vyring Gunship's armor and shield specs.
I think we can assume that the Vyring Gunship took some kind of damage from charging blindly through hot debris from the Sideguard we've just destroyed. The Sideguard had 19 HP, which means we have a rather high chance of destroying the Gunship as well with the firepower we just used, in two turns at most. We've also got another enemy ship waiting behind the two present.
We can either attack the Gunship in the same way we did the Sideguard, or attempt to escape. If we're attacking, the Respite should use the Autocannons this time, and since the Forsica only has shrapnel cannons, let's have them use the shrapnel cannons. We'll leave the Ambusher for last.