If you pick a base character then the prime gets removed as well, the better version cant exist without the base version, however if you remove a prime version then the base character can still exist. My personal pick would be Valkyr due to how [IMO] useless she seems
Chroma. His 2 and 3 are unhealthy design that completely overshadow his more flavorful 1. His 4 is a summon pinata that doesn’t make Chroma himself feel more like a dragon compared to, say, Shyvana R from League of Legends.
I’d like to see him actually fly like Titania 4 and have every ability feel like part of his fantasy (like Sevagoth). Add to that the burden of working in his elemental subtheme (hence “Chroma”), and a total rework akin to deleting the OG Chroma sounds better and better.