I think I sticked to only using Fire type when I played one of the recent games, if only because a lot of my favorite pokemon (Ninetales, Arcanine, Houndoom, Salazzle) were that type.
Getting the TM for Flamethrower late in the game was a massive power spike. Type coverage isn't really an issue as well, because of sunny day + solarbeam.
Awoo fellow furs!
Best of luck on the instance and the Lemmy fork!