So I'm currently working on an arena-style mod, that will spawn waves of enemies for the player to fight, but was wondering what the best way to build and test the encounters would be?

Right now I'm just spawning 3 other random humans in, and using CharacterAddToParty and CharacterMakePlayer to create the party. I would then have to artificially level each player up, assign skills, and only then could I actually test the encounter. And since I'm doing all of this in the initialise part of the Osiris story, any time I reload the story to retest I would have to do it again. Is there a smarter way than this to do the testing, or an easy way to test encounters?