Didn't have any flying types with dragonkin damage leveled, so I swapped things around a little:
- use Parasitic Boarfly first (breed should be irrelevant), drain blood to stay topped up and flurry to kill Deckhand and then do dmg to Corrupted Slime
-> Note: Deckhand did not use sweep in this fight at all, results might be different when sweep is used
- 'Snowfeather Hatchling to wrap up Corrupted Slime (used squawk/falcosaurier swarm to do so)
- Ikky with Black Claw/Flock to finish up Tentacle
I used Ikky, Gilnean Raven (2 2 1), and Mechanical Axebeak (2 2 1). I got lucky and Call Darkness blocked a few of the enemy's hits and none of mine, but Mechanical Axebeak had full health at the end, so it should work even if your luck isn't quite as good.
Personally, I went over to just having the script editor open and not hit anything but "execute script" during the fights. That forces you to write the strat as a script while you go. With the comments in the Rematch note next to it, it usually is quite easy to determine what should be the next priority. That works for 90% of the scripts.