Leopard can be pretty variable. I do think it's there in some of the OS. 305, 306, 308 I'm pretty certain of, and 301, 307, 309 I'd like to see more angles to get a better idea but poss Leo as well. Leopard is not showing super obviously in your line for whatever reason, but I definitely see the side pattern going up over the dorsal to the other side, weird connections, the eyes of the alien heads moving around, and so forth. On 308 how some of the eyes go vertical so there are 4 going across the dorsal is very Leopard-like, where a typical Firefly would just get keyholes with eyes on either side or possibly one eye stretched up over the dorsal.
I agree 307 is a bit bright in the blushing, and likely has weak expression of Pastel.
Otherwise I think your ID's are spot on.