It’s really funny that out of all the Pokémon available the randomizer chose Slugma. I didn’t think I’d see the day where people would be brainstorming meta sets for this little fella. And now it’s Bombirdier. That’s just as random. If I had enough people I would definitely try this.
I’m just confused as to why you picked a fire type move to go against other slugma. I get that there’s tera, and it’s a free for all, but I’m surprised you didn’t put earth power on there for extra coverage.
Because of stab (1.5 boost) and tera (~1.5 boost), a resisted fire move does a similar amount of damage as a neutral ground move. Additionally using a spread move reduces the damage of a move by roughly a quarter per target, but you hit 3 targets. I only wanted one damaging move on my set, so I thought heat wave was the least risky option, since it hits hard even into a resist (though lava plume was just a better choice). That being said, the fun of this mode is that we often get our picks wrong, and there’s no shortage of correct answers. Earth Power is a valid pick! Whatever floats your goat.