Not quite correct. Watcher has 413sp so any moth with >271sp is fast enough, and of all moths with Call Lightning there are only 2 breeds of Vale Flitter that have <271 (H/P and P/P breeds).
There is no mathematical way this strat can fail if people follow the right steps.
Vaania above, for example, must have used a soak pet for Antaen Cannon instead of putting the moth in first. There's no other way Ikky could get hit twice.
Three hatchlings worked for me first try. Bloodgazer, Direbeak and Snowfeather.
Bloodgazer swarm then bloodgazer dies,
Direbeak strike then swarm, ironskin, swarm Direbeak dies,
Snowfeather strike and then swarm.
watcher dead :)
If you don't hit 3 times with Slicing Wind you may need to use your third pet. Had another falcosaur in the wings (no pun intended) waiting to use Predatory Strike, but almost any pet would be able to finish him off.
Much better than solidstate77's strat. Fast, reliable.
I don't get how solidstate77's can work. All the pets are 260 speed and there are no alternate breeds for faster versions of those pets. Watcher beat them to the punch every time.