I think it would be a great idea to add categories for each of the combat challenges and minigames that are speedrunable or has the time completed tracked in-game. People are already posting their videos on Youtube for many of them!

Minigames will very likely not get a leaderboard, though that's mostly my personal opinion and less of a community standpoint. If there is a reasonable demand for it we could add those. Combat Challenges aren't very well suited for speedruns mostly cause tactical mode also slows down the In-Game Timer for it as well which negates some of the speed aspect. The only way would be to enforce having no slowdown on Tactical Mode though that would be a hassle to mandate for verification.