For there to be an existing script someone would have to have the same exact setup and even the exact same keybinds and ingame macros, so it's very unlikely that an exact script you could just load exists. There are example scripts out there, even on the Hotkeynet site itself.

If all you want to do is have the priest follow the feral and throw some shields and heals on it, then any basic hotkey broadcasting setup would work. Just hardcode the heals and following in to your spells on the priest I guess. It would be very basic and not very flexible, but fi that is all you need, then go for it.