Extreme Track Toy is where it would be most versatile I think.
Only Rally Monsters which are somewhat close is the Audi Quattro S1 and Hoonigan RS200.
This has way more power than the Audi and way more downforce than the Hoonigan.
Very interesting dilemma though and I could see it being in either class, would definitely need some Hillclimbing company in Rally Monsters though like Rod Miller’s Tacoma.