Hello, i'm new to the competitive side of pokemon and i was wondering if you all could help me figure out a good move set for Gourgeist-Small.

Sorry in advance if this isn't that great of a set i have in mind already i'm new to this whole thing thats why im asking advice.

The set i'm thinking about for it right now is
Trick-or-Treat
Shadow Ball
Pain Split
Flamethrower